unsubstantiated, adj. unconfirmed, uncorroborated, unproven, unevidenced, unestablished, undemonstrated, experimental, tentative; debatable, questionable, open to debate or question, disputable, arguable, contestable, controvertible, moot; doubtful, dubious, dubita-ble, uncertain, unsure, indefinite, inconclusive.
unsuccessful, adj. 1. vain, futile, useless, unavailing, bootless; ineffectual, inefficacious, nugatory, worthless, inutile; fruitless, unproductive, abortive, stillborn, barren, sterile, impotent; unprofitable, unremunerative, ungainful, losing.
2. unfortunate, unprosperous, fortuneless, poor, bereft, infelicitous, unhappy; unlucky, luckless, hapless, ill-starred, ill-fated, under a cloud; victimized, jinxed, unblest, cursed; thwarted, scotched, foiled, crossed, frustrated, balked, stultified.
unsuitable, adj. 1. inappropriate, inapt, inapposite, unfitting, unbefitting, unmeet; unsuited, unfit, ill-adapted, incompatible, uncongenial; incongruous, inconsistent, out of keeping, out of place, out of character; disproportionate, inequitable.
2. inexpedient, disadvantageous, inadvisable; impractical, inapplicable, useless, no good, unfeasible; inopportune, unseasonable, untimely, infelicitous; irrelevant, nongermane, impertinent.
3. unseemly, unbecoming, indecorous, improper; unladylike, ungentlemanly, ungenteel, impolite; impolitic, imprudent, indiscreet, tactless, injudicious.
unsung, adj. unacclaimed, uncheered, unapplauded, unhailed; uncelebrated, unglorified, unexalted, unhonored, unmemorialized; unpraised, unlauded, unextolled; unacknowledged, unrecognized, unnoted, unnoticed; unrenowned, renownless, unfamous, unillustrious, un-eminent, undistinguished, Archaic, inglorious; unknown, anonymous, anonymal, nameless, innominate, unnamed, unidentified; unheard of, obscure, inconspicuous, background; inconsequential, insignificant, unimportant.
unsure, adj. 1. uncertain, unconvinced, dubious, doubtful, skeptical, suspicious, distrustful; ambivalent, of two minds, betwixt and between, on the fence; undecided, up in the air; irresolute, indecisive, infirm of purpose, wishy-washy. See - uncertain (defs. 2, 3).
2. unconfident, lacking in confidence, unassured, insecure, unsure of oneself, self-distrustful, self-distrusting; diffident, self-conscious, bashful, shy, timid; retiring, demure, reserved, holding back, constrained, restrained.
unsurpassed, adj. unexcelled, second to none, unrivaled, peerless, matchless, nonpareil, unparalleled, unequaled, incomparable, inimitable, Fr. sans pareil superlative, consummate, best, finest, choicest, greatest; supreme, paramount, ascendant, transcendent, highest, uppermost, topmost, top, tiptop, Latin, facile princeps; preeminent, foremost, first, primary, prime, leading; predominate, dominant, hegemonic, hege-monical.
unsuspecting, adj. unaware, off guard, napping, asleep; unprepared, unanticipative, unwarned, uninformed, unapprised; oblivious, unconscious, insensible, unmindful, paying no attention, inattentive, heedless; unsuspicious, unsuspectful, trustful, trusting, overtrustful; overcredulous, credulous, believing, gullible, Obs. cullible, easily deceived or taken in, deceivable, dupable, unexploitable; naive, ingenuous, wide-eyed, innocent; green, inexperienced, unsophisticated, ignorant.
unsymmetrical, adj. asymmetric, asymmetrical, unsymmetrized; nonparallel, unanalogous, noncorresponding, noncorrespondent, inconsistent, discrepant;
