equitable; unbiased, unprejudiced, unswayed, unprepossessed, unjaundiced.
2. stiff, wooden, rigid, starch, stuffy, stilted, straitlaced, prim, formal; mechanical, machinelike, computerlike; matter-of-fact, businesslike, business-as-usual.
impersonate, v. imitate, pretend to be, mimic, ape, SI. make like, monkey, parrot, repeat, reflect, mirror, echo; simulate, assume, represent, take on, affect; mock, parody, take off, caricature, burlesque,
impersonation, n. personation, mocking, imitating, imitation, parody, take-off, caricature, burlesque, travesty; mimicking, mimicry, Zool. mimesis, apery, monkeying.
impertinence, n. 1. insolence, impudence, audacity, effrontery, presumption, presumptuousness; boldness, brazenness, freshness, brashness, pertness, sauciness, shamelessness, Inf. cheekiness, Inf. sassiness, Inf brassiness; impoliteness, unmannerliness, ill-manneredness, incivility, rudeness; bumptiousness, cockiness, forwardness, chutzpah; meddlesomeness, intrusiveness, officiousness.
2. All Inf. brass, sass, face, cheek, back talk, guff, crust, sauce; All SI. gall, nerve, mouth, lip.
3. malapert, minx, hussy, boldface, brazenface, whip-persnapper, upstart, Inf saucebox, Inf smart aleck, Inf. smarty pants, SI. wise guy, SI. smart or wise ass.
4. irrelevance, immateriality, inapplicability, inappropriateness, inappositeness, inconsequence; unrelatedness, unconnectedness; absurdity, ludicrousness, ridiculousness.
impertinent, adj. 1. insolent, impudent, audacious, presumptuous, out-of-line, out-of-keeping; bold, brazen, brazen-faced, fresh, brash, pert, saucy, shameless, Inf. flip, Inf. cheeky, Inf. sassy, Inf. brassy, SI. wise, SI. mouthy, SI. smart-mouth; impolite, unman-nered, unmannerly, ill-mannered, uncivil, rude, ill-bred, vulgar, coarse, crude; bumptious, cocksure, cocky, arrogant, forward; meddlesome, intrusive, officious.
2. irrelevant, inapposite, inapplicable, immaterial, inconsequent; unrelated, unconnected, beside the point, beside the question, beside the mark, nothing to do with the case, Inf off base or way off base,
imperturbable, adj. inexcitable, unflappable, even-tempered, easy-going; self-controlled, steady, poised, balanced; calm, collected, composed, self-possessed, cool, Inf. cool as a cucumber, Inf. together; nonchalant, at ease, unruffled, untroubled, undismayed, unperturbed, undisturbed, unexcited, unmoved; sedate, tranquil, serene, placid, peaceful, dispassionate,
impervious, adj. 1. impassable, impenetrable, impermeable, inaccessible, imperviable; jungly, jungled, overgrown; trackless, pathless, wayless, untrodden.
2. proof, resistant, tight, airtight, snug, compact, hermetic, hermetically sealed; closed, shut, locked, sealed, sealed-off; solid, hard, rock-hard, adamantine; unporous, watertight, waterproof; punctureproof, im-perforable, imperforate, unpierceable, holeproof.
3. imperishable, indestructible, indissoluble, inextinguishable, infrangible, unbreakable; enduring, lasting, abiding, everlasting, eternal, immortal, deathless, undying.
4. callous, calloused, thickskinned, insensitive, unfeeling, hard, hard-hearted, hardened, inured, indurate, stony, flinty, steely; cold-hearted, cold-blooded, cold, frigid, frosty, icy, unsympathetic, unresponsive; un-influenceable, unswayable, unmovable; unpliable, inflexible, unyielding, obdurate, unpersuadable; unre-ceptive, unamenable, closed to.