unheard-of, adj. 1. unknown, unfamiliar, unexplained, unidentified; untouched, unexplored, uncharted, unrevealed, undiscovered, untapped; obscure, little-known, unnoted, unremarked, nameless; unrenowned, unsung, unhonored, uncelebrated, unfamed; undistinguished, unpopular, inglorious.
2. unprecedented, unexampled, new, novel, exceptional; original, unique, uncommon, unusual, singular; unordinary, out of the ordinary, offbeat, off the beaten track; surprising, unexpected, undreamedof, freakish, recherchd; unaccustomed, unwonted, never before encountered, improbable; unmatched, unparalleled, matchless, incomparable, unequaled; extraordinary, remarkable, sensational, marvelous, fabulous, fantastic, stupendous, tremendous, terrific.
unheeded, adj. ignored, disregarded, overlooked, neglected; unnoticed, unnoted, unobserved, unseen, unperceived; unminded, unobeyed, unfollowed, untaken.
unheralded, adj. untrumpeted, unannounced, unproclaimed, unadvertised, unpublicized, unpublished, unbroadcast; unexpected, unanticipated, unlooked-for, unforeseen, unpredicted, unprophesied; out of the blue or nowhere, sudden, abrupt, precipitate, surprise, sneak. See - unsung.
unhesitating, adj. 1. prompt, ready, immediate, intant, instantaneous, without delay; confident, assured, sure, certain, positive; believing, undoubting, unreserved, implicit, unquestioning, wholehearted.
2. unfaltering. See - unfaltering.
unhinge, v. 1. detach, disconnect, disengage, disjoin, separate, sever, cleave, part; remove, take away; open wide, split open.
2. unbalance, derange, distemper; make crazy or mad or insane, drive wild, drive out of one's mind, push over the brink, Sl. make [s.o.] crackers or bonkers; madden, craze, Archaic, bedlamize, Obs. dement; obsess, possess; disorient, confuse, confound, Inf. throw, overcome, Inf. flabbergast, Inf. slay, distract; perplex, bewilder, nonplus, Sl. blow one's mind, Sl. knock for a loop, knock over; upset, drive up the wall, agitate, Sl. drive nutty, perturb; disconcert, bother, trouble, disturb, distress; fluster, unnerve, shake, worry, rattle, abash, discompose; astound, astonish, stun, leave speechless.
3. unsettle, change, fluctuate, vary, alter, modify, mutate; disorder, disarrange, disarray, mess up, disorganize; tip over, turn topsy-turvy, move, stir; entangle, snarl, jumble, muddle, muddy.
unhoped-for, adj. unexpected, undreamed-of, beyond one's wildest hopes or dreams, like a dream come true; unanticipated, unlooked-for, unpredicted, unforeseen; surprising, out of the blue, astonishing, startling, astounding; unwonted, unusual, unpredictable; undesigned, unplanned, unintentional, unintended, unpurposed, extemporaneous; fortuitous, lucky, happy, serendipitous.
unhurried, adj. leisurely, leisured, slow, slow-moving, slow-going, deliberate; lingering, loitering, puttering, dillydallying, dawdling, Inf poky, tortoiselike, snail-like, slow-paced; slow and steady, easy, easy-going, loose, loose as a goose, slack, lax; indolent, idle, otiose, slower than molasses in January, lazy; inactive, sluggish, torpid, inert, lethargic, listless, phlegmatic.