insincere, a. disingenuous, dissembling, false, hypocritical, affected, deceitful.

insincerity, n. duplicity, disingenuousness, hypocrisy, dissimulation.

insinuation, n. innuendo, intimation; ingratiation.

insist, v. persist, press, urge, contend.

insistence, n. persistence, pertinacity, importunity, urgency, contention, instance.

insnare, v. ensnare, entrap, seduce, inveigle, allure, entangle.

insolation, n. sunstroke, siriasis, sun bath.

insolence, n. impudence, contumely, impertinence, contumacy, effrontery, disrespect.

insinuation, n. innuendo, intimation; ingratiation.

insist, v. persist, press, urge, contend.

insistence, n. persistence, pertinacity, importunity, urgency, contention, instance.

insistent, a. persistent, importunate, insisting.

insnare, v. ensnare, entrap, seduce, inveigle, allure, entangle.

insolation, n. sunstroke, siriasis; sun bath.

insolence, n. impudence, contumely, impertinence, contumacy, effrontery, disrespect.

insolent, a. impudent, contumelious, overbearing, disrespectful contemptuous.

insoluble, a. indissoluble; unexplainable, insolvable, inexplicable.

inspect, v. examine.

inspiration, n. inhalation (breathing in); divine afflatus, theopneusty.

inspiring, a. inspiriting, elevating, promethean.

in spite of. notwithstanding, despite, nevertheless.

install, v. instate, induct.

installation, n. induction.

instance, n. persistency, request, solicitation, urgency; example, case, illustration.

instantly, adv. immediately, forthwith, at once, instanter, urgently, persistently.

instep, n. metatarsus, acrotarsium.

instruct, v. teach, indoctrinate, edify, enlighten, coach.

instruction, n. nurture, tuition, teaching, information, indoctrination, inculcation, education, admonition; edification, enlightenment; propaedeutics.

instructive, a. edifying, didactic, preceptive, mentorial; propaedeutic.

instructor, n. teacher, preceptor, tutor, master, coach, mentor, counselor, monitor, trainer.

instrument, n. tool, utensil, implement; agent, means, medium.

insufferable, a. intolerable, unendurable; detestable, offensive.

insufficiency, n. deficiency, inadequacy.

insufficient, a. inadequate, deficient, incommensurate, lacking.

insult, n. indignity, affront.

insult, v. offend, affront, flout.

insulting, a. offensive, contemptuous, contumelious, scurrilous.

insurance, n. assurance, indemnity.

insure, v. assure, indemnify; underwrite.

insurgency, n. revolt, rebellion, insubordination, mutiny.

insurgent, a. rebellious, mutinous, insubordinate, insurrectionary.