in

• ink, link, wink, sink, rink, pink, mink, kink, clink, blink, brink, drink, chink, shrink, stink, think, in, bin, gin, tin, win, sin, spin, pin, pinpoint, fin, muffin, kin, skin, napkin, pumpkin, chin, shin, thin, within, twin, grin, chagrin, begin, Berlin, violin, robin, satin, toxin, vitamin, hint, tint, stint, lint, flint, glint, print, blueprint, fingerprint, footprint, imprint, sprint, splint, squint, mint, peppermint, spearmint, mince, since, wince, prince, convince, contingent, inch, pinch, cinch, clinch, flinch, lingo, single, kindle, wrinkle, twinkle, periwinkle, sprinkle, window, intermingle, jingle, bingo, binge, tinge, singe, hinge, hinder, finger, linger, tinker, sincere, distinguish, distinct, extinct, vintage, vindicate, rinse, ninja, kindred, intact, inset, insect, index, intense, intend, intent, invent, inept, inspect, incentive, integrity, intelligent, intestine, instead, increase, indeed, ingredient, inherent, inferior, interest, instant, instance, incident, indicate, increment, instrument, insist, instinct, intimidate, indignant, inquisitive, integer, income, infant, infamy, infamous, individual, intrigue, intrinsic, industry, invoice, incense, inventory, incubate, ingenious, indigenous, insidious, invite, inertia, intern*, infirmary, indulge, inductive, industrious, instruct, insult, incumbent, introduce, insure, insurance, injure, injury, intuitive, intuition, infraction, incur, infrastructure, inaugurate, insubordinate, coincident
*intern:當名詞時,重音落在第一音節;當動詞時,重音落在第二音節。

• prefix in- (not): inaction, inactive, ingratitude, inanimate, invalidate, invalid, inorganic, inelastic, inadequate, inaccurate, inexact, insubstantial, inaccessible, incapable, inapplicable, incompatible, ineradicable, intangible, incalculable, infallible, insatiable, indefatigable, incapacitate, insane, inaudible, inexhaustible, incautious, inauspicious, inarguable, invariably, inequality, inequity, infidelity, indemnity, indemnify, indirect, incorrect, indefinite, incredulous, incredible, inflexible, indelible, inedible, inevitable, ineligible, inseparable, inexorable, inextricable, inexplicable, inexpressible, inaccessible, incomprehensible, indefensible, indispensable, incontestable, inexpensive, inoffensive, insensitive, inattentive, ineffective, ineffectual, inconsequential, indefinite, indelicate, ineptitude, inelegant, independent, indigestion, inattention, incessant, inauthentic, inconceivable, indiscreet, incomplete, insincere, infrequent, incoherent, indecent, inconvenient, inexperience, inefficient, insufficient, inability, inconsistent, indifferent, indistinct, indistinguishable, inadmissible, invincible, invisible, indivisible, inimitable, inconsiderable, inconsiderate, inconspicuous, insipid, infinite, infinity, instability, insolent, indecision, indiscriminate, insignificant, inarticulate, infeasible, inadvisable, indescribable, indecipherable, insoluble, inoperable, inhospitable, inconsolable, incomparable, incontinence, incompetent, inconstant, incongruent, involuntary, insolvent, intolerance, inappropriate, indisposed, inordinate, informal, incorrigible, insupportable, insurmountable, injustice, insufferable, invulnerable, indestructible, incorruptible, inhuman, inopportune, insecure, incurable, inexcusable, indisputable, inscrutable, insuperable, inconclusive, inadvertent, indeterminate, indiscernible, incontrovertible, infirm

• prefix in- (in, into, on, of): into, input, intake, include, inbound, inside, internal, inward, indoor, inland, inbuilt, inhabit, inhale, inflame, ingrain, infiltrate, incorporate, insert, influx, inject, infect, ingest, infuse, induce, insight, invaluable, install, incline, ingrown, infringe, intrude, invade, inundate, inflate, indent, indebt, invest, inherit, investigate, infer, invert, instill, inhibit, institute, intricate, inquiry, inquire, inspire, incise, incision, inscribe, involve, invoke, inform, influence, inflict