2. promise, pledge, assurance, word, solemn word, word of honor, parole, Archaic, troth; vow, oath, sworn statement or declaration, testimony; endorsement, signature, written statement, testimonial; attestation, affirmation, profession, avowal, asseveration, avouchment; engagement, betrothal, Archaic, plight; marriage contract, marriage bond, marriage vow; obligation, bond, agreement, contract, compact, covenant, pact, Rare, paction, treaty; gentlemen's agreement, unwritten agreement, understanding; guarantee, guaranty, warrant, warranty, Law. covenant of warranty, Law. warranty deed, Obs. vouch,
undertone, n. 1. murmur, murmuration, whisper, breath, sigh; susurration, susurrus, rustle; low tone, hum, whir, whirring, purr, purring, vibration.
2. undercurrent, undermeaning, subsense; connotation, suggestion, implication, signification, insinuation; nuance, touch, trace, tinge, tint, inkling, intimation; odor, scent, taste, flavor; inference, supposition, coloration; meaning, sense, significance, purport, import,
undervalue, v. underestimate, underrate, rate too low, sell short, hold for naught, hold cheap, misprize; misjudge, miscalculate; disprize, hold in disrespect, look down on, set no store by; sneeze at, spit upon, Inf. look down one's nose at; despise, scorn, contemn, be contemptuous of, disdain; feel contempt for, hold in contempt, revile, depreciate, disparage, Inf. put down, ridicule, discredit, poke fun at; belittle, minimize, talk down.
underwater, adj. submarine, subaqueous, undersea; submerged, submersed, sunken,
underwear, n. underclothes, underclothing, undergarments, underthings, underdress, underpinnings, Inf. undies, Facetious, unmentionables, SI. skivvies, Both Brit, small clothes, smalls; lingerie, teddies, dainties, things, finery, fine washables; flannels, underflannels, long or thermal underwear, SI. long johns; underpants, pants, underdrawers, drawers; panties, bloomers, knickers, bikinis, G-strings; undershorts, shorts, boxer shorts, boxers, briefs, Trademark. Jockeys, Trademark. BVDs, Brit. Y-fronts, jockstrap, athletic supporter; undershirt, T-shirt, Both Brit, undervest, vest, SI. skivvy shirt; bra, brassiere, uplift; slip, halfslip, camisole, petticoat, underskirt, chemise, shimmy, shift, hoop, hoopskirt; girdle, corset, corselete, panty girdle, garter belt, Chiefly Brit, stays,
underweight, adj. skinny, skin-and-bones, fleshless, gaunt, bony, rawboned, skeletal; spindly, spindle-shanked, twiggy, gangling, scrawny, scraggy, undersized; undernourished, underfed, half-starved, starved-look-ing; hollow-cheeked, pinched, shrunken, wasted, emaciate, emaciated.
underworld, n. 1. criminal element of society, the mob, the Mafia, the syndicate, organized crime; dregs of society, scum of the earth, riffraff, rabble, Contemptuous. ragtag and bobtail.
2. abode of the dead, nether regions, grave, hell; Sheol, Hades, Orcus, Dis, Avernus.
underwrite, v. 1. sign, countersign, co-sign, endorse, initial, put one's name to; mark, letter, inscribe, engrave, character, stamp, seal.
2. subscribe to, agree to, consent, accede, approve, sanction, Inf. O.K.; concur with, confirm, ratify, corroborate, verify, validate, certify.
3. guarantee, back; subsidize, aid, sponsor, promote, maintain, uphold, support, keep.
undesirable, adj. unattractive, uninviting, disagreeable, unpopular; objectionable, indecorous, unseemly, unbecoming, unbefitting, out of place; unfit, unsuitable, inappropriate; unallowable, ineligible, unadvisable, uncommendable, unpraiseworthy, unsatisfactory; inadmissible, unacceptable, untenable, unfeasible, indefensible, unjustifiable; detrimental, disadvantageous, harm-