Vocabulary (I)

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