| Serial | Word | Meaning |
|---|---|---|
| 1 | ichthyic adj. | Fish-like |
| 2 | ichthyology n. | The branch of zoology that treats of fishes |
| 3 | ichthyosaurs n. | A fossil reptile |
| 4 | icily adv. | Frigidly |
| 5 | iciness n. | The state of being icy |
| 6 | icon n. | An image or likeness |
| 7 | iconoclast n. | An image-breaker |
| 8 | idealize v. | To make to conform to some mental or imaginary standard |
| 9 | idiom n. | A use of words peculiar to a particular language |
| 10 | idiosyncrasy n. | A mental quality or habit peculiar to an individual |
| 11 | idolize v. | To regard with inordinate love or admiration |
| 12 | ignoble adj. | Low in character or purpose |
| 13 | ignominious adj. | Shameful |
| 14 | Iliad n. | A Greek epic poem describing scenes from the siege of Troy |
| 15 | illegal adj. | Not according to law |
| 16 | illegible adj. | Undecipherable |
| 17 | illegitimate adj. | Unlawfully begotten |
| 18 | illiberal adj. | Stingy |
| 19 | illicit adj. | Unlawful |
| 20 | illimitable adj. | Boundless |
| 21 | illiterate adj. | Having little or no book-learning |
| 22 | ill-natured adj. | Surly |
| 23 | illogical adj. | Contrary to the rules of sound thought |
| 24 | illuminant n. | That which may be used to produce light |
| 25 | illuminate v. | To supply with light |
| 26 | illumine v. | To make bright or clear |
| 27 | illusion n. | An unreal image presented to the senses |
| 28 | illusive adj. | Deceptive |
| 29 | illusory adj. | Deceiving or tending to deceive, as by false appearance |
| 30 | imaginable adj. | That can be imagined or conceived in the mind |
| 31 | imaginary adj. | Fancied |
| 32 | imbibe v. | To drink or take in |
| 33 | imbroglio n. | A misunderstanding attended by ill feeling, perplexity, or strife |
| 34 | imbrue v. | To wet or moisten |
| 35 | imitation n. | That which is made as a likeness or copy |
| 36 | imitator n. | One who makes in imitation |
| 37 | immaculate adj. | Without spot or blemish |
| 38 | immaterial adj. | Of no essential consequence |
| 39 | immature adj. | Not full-grown |
| 40 | immeasurable adj. | Indefinitely extensive |
| 41 | immense adj. | Very great in degree, extent, size, or quantity |
| 42 | immerse v. | To plunge or dip entirely under water or other fluid |
| 43 | immersion n. | The act of plunging or dipping entirely under water or another fluid |
| 44 | immigrant n. | A foreigner who enters a country to settle there |
| 45 | immigrate v. | To come into a country or region from a former habitat |
| 46 | imminence n. | Impending evil or danger |
| 47 | imminent adj. | Dangerous and close at hand |
| 48 | immiscible adj. | Separating, as oil and water |
| 49 | immoral adj. | Habitually engaged in licentious or lewd practices |
| 50 | immortalize v. | To cause to last or to be known or remembered throughout a great or indefinite length of time |
| 51 | immovable adj. | Steadfast |
| 52 | immune adj. | Exempt, as from disease |
| 53 | immutable adj. | Unchangeable |
| 54 | impair v. | To cause to become less or worse |
| 55 | impalpable adj. | Imperceptible to the touch |
| 56 | impartial adj. | Unbiased |
| 57 | impassable adj. | That can not be passed through or over |
| 58 | impassible adj. | Not moved or affected by feeling |
| 59 | impassive adj. | Unmoved by or not exhibiting feeling |
| 60 | impatience n. | Unwillingness to brook delays or wait the natural course of things |
| 61 | impeccable adj. | Blameless |
| 62 | impecunious adj. | Having no money |
| 63 | impede v. | To be an obstacle or to place obstacles in the way of |
| 64 | impel v. | To drive or urge forward |
| 65 | impend v. | To be imminent |
| 66 | imperative adj. | Obligatory |
| 67 | imperceptible adj. | Indiscernible |
| 68 | imperfectible adj. | That can not be perfected |
| 69 | imperil v. | To endanger |
| 70 | imperious adj. | Insisting on obedience |
| 71 | impermissible adj. | Not permissible |
| 72 | impersonal adj. | Not relating to a particular person or thing |
| 73 | impersonate v. | To appear or act in the character of |
| 74 | impersuadable adj. | Unyielding |
| 75 | impertinence n. | Rudeness |
| 76 | imperturbable adj. | Calm |
| 77 | impervious adj. | Impenetrable |
| 78 | impetuosity n. | Rashness |
| 79 | impetuous adj. | Impulsive |
| 80 | impetus n. | Any impulse or incentive |
| 81 | impiety n. | Irreverence toward God |
| 82 | impious adj. | Characterized by irreverence or irreligion |
| 83 | implausible adj. | Not plausible |
| 84 | impliable adj. | Capable of being inferred |
| 85 | implicate v. | To show or prove to be involved in or concerned |
| 86 | implicit adj. | Implied |
| 87 | imply v. | To signify |
| 88 | impolitic adj. | Inexpedient |
| 89 | importation n. | The act or practice of bringing from one country into another |
| 90 | importunate adj. | Urgent in character, request, or demand |
| 91 | importune v. | To harass with persistent demands or entreaties |
| 92 | impotent adj. | Destitute of or lacking in power, physical, moral, or intellectual |
| 93 | impoverish v. | To make indigent or poor |
| 94 | impracticable adj. | Not feasible |
| 95 | impregnable adj. | That can not be taken by assault |
| 96 | impregnate v. | To make pregnant |
| 97 | impromptu n. | Anything done or said on the impulse of the moment |
| 98 | improper adj. | Not appropriate, suitable, or becoming |
| 99 | impropriety n. | The state or quality of being unfit, unseemly, or inappropriate |
| 100 | improvident adj. | Lacking foresight or thrift |
| 101 | improvise v. | To do anything extemporaneously or offhand |
| 102 | imprudent adj. | Heedless |
| 103 | impudence n. | Insolent disrespect |
| 104 | impugn v. | To assail with arguments, insinuations, or accusations |
| 105 | impulsion n. | Impetus |
| 106 | impulsive adj. | Unpremeditated |
| 107 | impunity n. | Freedom from punishment |
| 108 | impure adj. | Tainted |
| 109 | impute v. | To attribute |
| 110 | inaccessible adj. | Difficult of approach |
| 111 | inaccurate adj. | Not exactly according to the facts |
| 112 | inactive adj. | Inert |
| 113 | inadequate adj. | Insufficient |
| 114 | inadmissible adj. | Not to be approved, considered, or allowed, as testimony |
| 115 | inadvertent adj. | Accidental |
| 116 | inadvisable adj. | Unadvisable |
| 117 | inane adj. | Silly |
| 118 | inanimate adj. | Destitute of animal life |
| 119 | inapprehensible adj. | Not to be understood |
| 120 | inapt adj. | Awkward or slow |
| 121 | inarticulate adj. | Speechless |
| 122 | inaudible adj. | That can not be heard |
| 123 | inborn adj. | Implanted by nature |
| 124 | inbred adj. | Innate |
| 125 | incandescence n. | The state of being white or glowing with heat |
| 126 | incandescent adj. | White or glowing with heat |
| 127 | incapacitate v. | To deprive of power, capacity, competency, or qualification |
| 128 | incapacity n. | Want of power to apprehend, understand, and manage |
| 129 | incarcerate v. | To imprison |
| 130 | incendiary n. | Chemical or person who starts a fire-literally or figuratively |
| 131 | incentive n. | That which moves the mind or inflames the passions |
| 132 | inception n. | The beginning |
| 133 | inceptive adj. | Beginning |
| 134 | incessant adj. | Unceasing |
| 135 | inchmeal adv. | Piecemeal |
| 136 | inchoate adj. | Incipient |
| 137 | inchoative n. | That which begins, or expresses beginning |
| 138 | incidence n. | Casual occurrence |
| 139 | incident n. | A happening in general, especially one of little importance |
| 140 | incidentally adv. | Without intention |
| 141 | incinerate v. | To reduce to ashes |
| 142 | incipience n. | Beginning |
| 143 | incipient adj. | Initial |
| 144 | incisor n. | A front or cutting tooth |
| 145 | incite v. | To rouse to a particular action |
| 146 | incitement n. | That which moves to action, or serves as an incentive or stimulus |
| 147 | incoercible adj. | Incapable of being forced, constrained, or compelled |
| 148 | incoherence n. | Want of connection, or agreement, as of parts or ideas in thought, speech, etc |
| 149 | incoherent adj. | Not logically coordinated, as to parts, elements, or details |
| 150 | incombustible adj. | That can not be burned |
| 151 | incomparable adj. | Matchless |
| 152 | incompatible adj. | Discordant |
| 153 | incompetence n. | General lack of capacity or fitness |
| 154 | incompetent adj. | Not having the abilities desired or necessary for any purpose |
| 155 | incomplete adj. | Lacking some element, part, or adjunct necessary or required |
| 156 | incomprehensible adj. | Not understandable |
| 157 | incompressible adj. | Resisting all attempts to reduce volume by pressure |
| 158 | inconceivable adj. | Incomprehensible |
| 159 | incongruous adj. | Unsuitable for the time, place, or occasion |
| 160 | inconsequential adj. | Valueless |
| 161 | inconsiderable adj. | Small in quantity or importance |
| 162 | inconsistent adj. | Contradictory |
| 163 | inconstant adj. | Changeable |
| 164 | incontrovertible adj. | Indisputable |
| 165 | inconvenient adj. | Interfering with comfort or progress |
| 166 | indefensible adj. | Untenable |
| 167 | indefinitely adv. | In a vague or uncertain way |
| 168 | indelible adj. | That can not be blotted out, effaced, destroyed, or removed |
| 169 | indescribable adj. | That can not be described |
| 170 | indestructible adj. | That can not be destroyed |
| 171 | indicant adj. | That which points out |
| 172 | indicator n. | One who or that which points out |
| 173 | indict v. | To find and declare chargeable with crime |
| 174 | indigence n. | Poverty |
| 175 | indigenous adj. | Native |
| 176 | indigent adj. | Poor |
| 177 | indigestible adj. | Not digestible, or difficult to digest |
| 178 | indigestion n. | Difficulty or failure in the alimentary canal in changing food into absorptive nutriment |
| 179 | indignant adj. | Having such anger and scorn as is aroused by meanness or wickedness |
| 180 | indignity n. | Unmerited contemptuous conduct or treatment |
| 181 | indiscernible adj. | Not perceptible |
| 182 | indiscreet adj. | Lacking wise judgment |
| 183 | indiscriminate adj. | Promiscuous |
| 184 | indispensable adj. | Necessary or requisite for the purpose |
| 185 | indistinct adj. | Vague |
| 186 | indivertible adj. | That can not be turned aside |
| 187 | indivisible adj. | Not separable into parts |
| 188 | indolence n. | Laziness |
| 189 | indolent adj. | Habitually inactive or idle |
| 190 | indomitable adj. | Unconquerable |
| 191 | induct v. | To bring in |
| 192 | indulgence n. | The yielding to inclination, passion, desire, or propensity in oneself or another |
| 193 | indulgent adj. | Yielding to the desires or humor of oneself or those under one’s care |
| 194 | inebriate v. | To intoxicate |
| 195 | inedible adj. | Not good for food |
| 196 | ineffable adj. | Unutterable |
| 197 | inefficient adj. | Not accomplishing an intended purpose |
| 198 | inefficiency n. | That which does not accomplish an intended purpose |
| 199 | ineligible adj. | Not suitable to be selected or chosen |
| 200 | inept adj. | Not fit or suitable |
| 201 | inert adj. | Inanimate |
| 202 | inestimable adj. | Above price |
| 203 | inevitable adj. | Unavoidable |
| 204 | inexcusable adj. | Not to be justified |
| 205 | inexhaustible adj. | So large or furnishing so great a supply as not to be emptied, wasted, or spent |
| 206 | inexorable adj. | Unrelenting |
| 207 | inexpedient adj. | Unadvisable |
| 208 | inexpensive adj. | Low-priced |
| 209 | inexperience n. | Lack of or deficiency in experience |
| 210 | inexplicable adj. | Such as can not be made plain |
| 211 | inexpressible adj. | Unutterable |
| 212 | inextensible adj. | Of unchangeable length or area |
| 213 | infallible adj. | Exempt from error of judgment, as in opinion or statement |
| 214 | infamous adj. | Publicly branded or notorious, as for vice, or crime |
| 215 | infamy n. | Total loss or destitution of honor or reputation |
| 216 | inference n. | The derivation of a judgment from any given material of knowledge on the ground of law |
| 217 | infernal adj. | Akin to or befitting hell or its occupants |
| 218 | infest v. | To be present in such numbers as to be a source of annoyance, trouble, or danger |
| 219 | infidel n. | One who denies the existence of God |
| 220 | infidelity n. | Disloyalty |
| 221 | infinite adj. | Measureless |
| 222 | infinity n. | Boundless or immeasurable extension or duration |
| 223 | infirm adj. | Lacking in bodily or mental strength |
| 224 | infirmary n. | A place for the reception or treatment of the sick |
| 225 | infirmity n. | A physical, mental, or moral weakness or flaw |
| 226 | inflammable adj. | Easily set on fire or excited |
| 227 | inflammation n. | A morbid process in some part of the body characterized by heat, swelling, and pain |
| 228 | inflexible adj. | That can not be altered or varied |
| 229 | influence n. | Ability to sway the will of another |
| 230 | influential adj. | Having the power to sway the will of another |
| 231 | influx n. | Infusion |
| 232 | infrequence n. | Rareness |
| 233 | infrequent adj. | Uncommon |
| 234 | infringe v. | To trespass upon |
| 235 | infuse v. | To instill, introduce, or inculcate, as principles or qualities |
| 236 | infusion n. | The act of imbuing, or pouring in |
| 237 | ingenious adj. | Evincing skill, originality, or cleverness, as in contrivance or arrangement |
| 238 | ingenuity n. | Cleverness in contriving, combining, or originating |
| 239 | ingenuous adj. | Candid, frank, or open in character or quality |
| 240 | inglorious adj. | Shameful |
| 241 | ingraft v. | To set or implant deeply and firmly |
| 242 | ingratiate v. | To win confidence or good graces for oneself |
| 243 | ingratitude n. | Insensibility to kindness |
| 244 | ingredient n. | Component |
| 245 | inherence n. | The state of being permanently existing in something |
| 246 | inherent adj. | Intrinsic |
| 247 | inhibit v. | To hold back or in |
| 248 | inhospitable adj. | Not disposed to entertain strangers gratuitously |
| 249 | inhuman adj. | Savage |
| 250 | inhume v. | To place in the earth, as a dead body |
| 251 | inimical adj. | Adverse |
| 252 | iniquity n. | Gross wrong or injustice |
| 253 | initiate v. | To perform the first act or rite |
| 254 | inject v. | To introduce, as a fluid, by injection |
| 255 | injunction n. | Mandate |
| 256 | inkling n. | A hint |
| 257 | inland adj. | Remote from the sea |
| 258 | inlet n. | A small body of water leading into a larger |
| 259 | inmost adj. | Deepest within |
| 260 | innocuous adj. | Harmless |
| 261 | innovate v. | To introduce or strive to introduce new things |
| 262 | innuendo n. | Insinuation |
| 263 | innumerable adj. | Countless |
| 264 | inoffensive adj. | Causing nothing displeasing or disturbing |
| 265 | inopportune adj. | Unsuitable or inconvenient, especially as to time |
| 266 | inquire v. | To ask information about |
| 267 | inquisition n. | A court or tribunal for examination and punishment of heretics |
| 268 | inquisitive adj. | Given to questioning, especially out of curiosity |
| 269 | inquisitor n. | One who makes an investigation |
| 270 | inroad n. | Forcible encroachment or trespass |
| 271 | insatiable adj. | That desires or craves immoderately or unappeasably |
| 272 | inscribe v. | To enter in a book, or on a list, roll, or document, by writing |
| 273 | inscrutable adj. | Impenetrably mysterious or profound |
| 274 | insecure adj. | Not assured of safety |
| 275 | insensible adj. | Imperceptible |
| 276 | insentient adj. | Lacking the power of feeling or perceiving |
| 277 | inseparable adj. | That can not be separated |
| 278 | insidious adj. | Working ill by slow and stealthy means |
| 279 | insight n. | Intellectual discernment |
| 280 | insignificance n. | Lack of import or of importance |
| 281 | insignificant adj. | Without importance, force, or influence |
| 282 | insinuate v. | To imply |
| 283 | insipid adj. | Tasteless |
| 284 | insistence n. | Urgency |
| 285 | insistent adj. | Urgent |
| 286 | insolence n. | Pride or haughtiness exhibited in contemptuous and overbearing treatment of others |
| 287 | insolent adj. | Impudent |
| 288 | insomnia n. | Sleeplessness |
| 289 | inspector n. | An official appointed to examine or oversee any matter of public interest or importance |
| 290 | instance n. | A single occurrence or happening of a given kind |
| 291 | instant n. | A very brief portion of time |
| 292 | instantaneous adj. | Done without perceptible lapse of time |
| 293 | instigate v. | To provoke |
| 294 | instigator n. | One who incites to evil |
| 295 | instill v. | To infuse |
| 296 | instructive adj. | Conveying knowledge |
| 297 | insufficiency n. | Inadequacy |
| 298 | insufficient adj. | Inadequate for some need, purpose, or use |
| 299 | insular adj. | Pertaining to an island |
| 300 | insulate v. | To place in a detached state or situation |
| 301 | insuperable adj. | Invincible |
| 302 | insuppressible adj. | Incapable of being concealed |
| 303 | insurgence n. | Uprising |
| 304 | insurgent n. | One who takes part in forcible opposition to the constituted authorities of a place |
| 305 | insurrection n. | The state of being in active resistance to authority |
| 306 | intangible adj. | Not perceptible to the touch |
| 307 | integrity n. | Uprightness of character and soundness of moral principle |
| 308 | intellect n. | The faculty of perception or thought |
| 309 | intellectual adj. | Characterized by intelligence |
| 310 | intelligence n. | Capacity to know or understand |
| 311 | intelligible adj. | Comprehensible |
| 312 | intemperance n. | Immoderate action or indulgence, as of the appetites |
| 313 | intension n. | The act of stringing or stretching, or state of being strained |
| 314 | intensive adj. | Adding emphasis or force |
| 315 | intention n. | That upon which the mind is set |
| 316 | interact v. | To act reciprocally |
| 317 | intercede v. | To mediate between persons |
| 318 | intercept v. | To interrupt the course of |
| 319 | intercession n. | Entreaty in behalf of others |
| 320 | intercessor n. | A mediator |
| 321 | interdict n. | Authoritative act of prohibition |
| 322 | interim n. | Time between acts or periods |
| 323 | interlocutor n. | One who takes part in a conversation or oral discussion |
| 324 | interlude n. | An action or event considered as coming between others of greater length |
| 325 | intermediate adj. | Being in a middle place or degree or between extremes |
| 326 | interminable adj. | Having no limit or end |
| 327 | intermission n. | A recess |
| 328 | intermit v. | To cause to cease temporarily |
| 329 | intermittent adj. | A temporary discontinuance |
| 330 | interpolation n. | Verbal interference |
| 331 | interpose v. | To come between other things or persons |
| 332 | interposition n. | A coming between |
| 333 | interpreter n. | A person who makes intelligible the speech of a foreigner by oral translation |
| 334 | interrogate v. | To examine formally by questioning |
| 335 | interrogative adj. | Having the nature or form of a question |
| 336 | interrogatory n. | A question or inquiry |
| 337 | interrupt v. | To stop while in progress |
| 338 | intersect v. | To cut through or into so as to divide |
| 339 | intervale n. | A low tract of land between hills, especially along a river |
| 340 | intervene v. | To interfere for some end |
| 341 | intestacy n. | The condition resulting from one’s dying not having made a valid will |
| 342 | intestate adj. | Not having made a valid will |
| 343 | intestine n. | That part of the digestive tube below or behind the stomach, extending to the anus |
| 344 | intimacy n. | Close or confidential friendship |
| 345 | intimidate v. | To cause to become frightened |
| 346 | intolerable adj. | Insufferable |
| 347 | intolerance n. | Inability or unwillingness to bear or endure |
| 348 | intolerant adj. | Bigoted |
| 349 | intoxicant n. | Anything that unduly exhilarates or excites |
| 350 | intoxicate v. | To make drunk |
| 351 | intracellular adj. | Occurring or situated within a cell |
| 352 | intramural adj. | Situated within the walls of a city |
| 353 | intrepid adj. | Fearless and bold |
| 354 | intricacy n. | Perplexity |
| 355 | intricate adj. | Difficult to follow or understand |
| 356 | intrigue n. | A plot or scheme, usually complicated and intended to accomplish something |
| 357 | intrinsic adj. | Inherent |
| 358 | introductory adj. | Preliminary |
| 359 | introgression n. | Entrance |
| 360 | intromit v. | To insert |
| 361 | introspect v. | To look into |
| 362 | introspection n. | The act of observing and analyzing one’s own thoughts and feelings |
| 363 | introversion n. | The act of turning or directing inward, physically or mentally |
| 364 | introvert v. | To turn within |
| 365 | intrude v. | To come in without leave or license |
| 366 | intrusion n. | The act of entering without warrant or invitation; encroachment |
| 367 | intuition n. | Instinctive knowledge or feeling |
| 368 | inundate v. | To fill with an overflowing abundance |
| 369 | inundation n. | Flood |
| 370 | inure v. | To harden or toughen by use, exercise, or exposure |
| 371 | invalid adj. | Having no force, weight, or cogency |
| 372 | invalid n. | One who is disabled by illness or injury |
| 373 | invalidate v. | To render of no force or effect |
| 374 | invaluable adj. | Exceedingly precious |
| 375 | invariable adj. | Unchangeable |
| 376 | invasion n. | Encroachment, as by an act of intrusion or trespass |
| 377 | invective n. | An utterance intended to cast censure, or reproach |
| 378 | inveigh v. | To utter vehement censure or invective |
| 379 | inventive adj. | Quick at contrivance |
| 380 | inverse adj. | Contrary in tendency or direction |
| 381 | inversion n. | Change of order so that the first shall become last and the last first |
| 382 | invert v. | To turn inside out, upside down, or in opposite direction |
| 383 | investigator n. | One who investigates |
| 384 | investor n. | One who invests money |
| 385 | inveterate adj. | Habitual |
| 386 | invidious adj. | Showing or feeling envy |
| 387 | invigorate v. | To animate |
| 388 | invincible adj. | Not to be conquered, subdued, or overcome |
| 389 | inviolable adj. | Incapable of being injured or disturbed |
| 390 | invoke v. | To call on for assistance or protection |
| 391 | involuntary adj. | Unwilling |
| 392 | involution n. | Complication |
| 393 | involve v. | To draw into entanglement, literally or figuratively |
| 394 | invulnerable adj. | That can not be wounded or hurt |
| 395 | inwardly adv. | With no outward manifestation |
| 396 | iota n. | A small or insignificant mark or part |
| 397 | irascible adj. | Prone to anger |
| 398 | irate adj. | Moved to anger |
| 399 | ire n. | Wrath |
| 400 | iridescence n. | A many-colored appearance |
| 401 | iridescent adj. | Exhibiting changing rainbow-colors due to the interference of the light |
| 402 | irk v. | To afflict with pain, vexation, or fatigue |
| 403 | irksome adj. | Wearisome |
| 404 | irony n. | Censure or ridicule under cover of praise or compliment |
| 405 | irradiance n. | Luster |
| 406 | irradiate v. | To render clear and intelligible |
| 407 | irrational adj. | Not possessed of reasoning powers or understanding |
| 408 | irreducible adj. | That can not be lessened |
| 409 | irrefragable adj. | That can not be refuted or disproved |
| 410 | irrefrangible adj. | That can not be broken or violated |
| 411 | irrelevant adj. | Inapplicable |
| 412 | irreligious adj. | Indifferent or opposed to religion |
| 413 | irreparable adj. | That can not be rectified or made amends for |
| 414 | irrepressible adj. | That can not be restrained or kept down |
| 415 | irresistible adj. | That can not be successfully withstood or opposed |
| 416 | irresponsible adj. | Careless of or unable to meet responsibilities |
| 417 | irreverence n. | The quality showing or expressing a deficiency of veneration, especially for sacred things |
| 418 | irreverent adj. | Showing or expressing a deficiency of veneration, especially for sacred things |
| 419 | irreverential adj. | Showing or expressing a deficiency of veneration, especially for sacred things |
| 420 | irreversible adj. | Irrevocable |
| 421 | irrigant adj. | Serving to water lands by artificial means |
| 422 | irrigate v. | To water, as land, by ditches or other artificial means |
| 423 | irritable adj. | Showing impatience or ill temper on little provocation |
| 424 | irritancy n. | The quality of producing vexation |
| 425 | irritant n. | A mechanical, chemical, or pathological agent of inflammation, pain, or tension |
| 426 | irritate v. | To excite ill temper or impatience in |
| 427 | irruption n. | Sudden invasion |
| 428 | isle n. | An island |
| 429 | islet n. | A little island |
| 430 | isobar n. | A line joining points at which the barometric pressure is the same at a specified moment |
| 431 | isochronous adj. | Relating to or denoting equal intervals of time |
| 432 | isolate v. | To separate from others of its kind |
| 433 | isothermal adj. | Having or marking equality of temperature |
| 434 | itinerant adj. | Wandering |
| 435 | itinerary n. | A detailed account or diary of a journey |
| 436 | itinerate v. | To wander from place to place |