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udeness, effrontery, Colloq cheek, brass, brassiness, nerve,
gall, Slang chutzpah: Why, the impertinence of that waitress to
call you by your Christian name!
impertinent
adj. presumptuous, insolent, bold, brazen, impudent, brash,
saucy, pert, uncivil, forward, impolite, discourteous,
disrespectful, audacious, rude, Colloq cheeky, fresh, brassy, US
nervy: That impertinent little upstart had the nerve to ask the
lady's age!
impetuous adj. spontaneous, unpremeditated, impulsive, unplanned, hasty,
abrupt, precipitate, quick, unthinking, unreasoned, offhand,
rash, reckless, spur-of-the-moment, unreflective, headlong:
Don't be impetuous and accept the first offer that comes along.
impetus n. drive, stimulus, push, impulse, goad, thrust, energy,
momentum, stimulation, incentive, motivation, encouragement,
inspiration: Roger's innovative ideas provided the impetus to
develop new products.
impious adj. irreligious, irreverent, ungodly, sacrilegious,
blasphemous, profane, unholy, wicked, sinful, iniquitous: The
priest said that he would be punished for his impious remarks.
implacable
adj. unappeasable, unmollifiable, unpacifiable, unforgiving,
intractable, uncompromising, inflexible, inexorable, unyielding,
unrelenting, ruthless, cruel, pitiless, merciless, hard, rigid,
unsympathetic, uncompassionate: Ever since that incident at
school he has been my implacable enemy.
implant v. 1 introduce, instil, insinuate, inject; indoctrinate,
inculcate, teach, impress, imprint: They spent months
implanting that notion in his mind. 2 graft, root, embed,
inlay: You must implant the scion nearer the main stem.
--n. 3 graft, scion, ingraft; insert: Are they really
experimenting with brain implants to improve the memory?
implausible
adj. improbable, unlikely, doubtful, dubious, questionable,
unbelievable, incredible, far-fetched, unconvincing, debatable,