unavailing, a. futile, nugatory, ineffectual, abortive, vain, bootless.

unavoidable, a. inevitable, unpreventable, ineludable.

unaware, a. unconscious, unmindful, insensible.

unbearable, a. intolerable, insufferable, unendurable.

unbecoming, a. inappropriate, unseemly, unsuitable, indecorous.

unbegotten, a. self-existent.

unbelief, n. incredulity, skepticism, doubt, infidelity, distrust, suspicion.

unbelievable, a. incredible, implausible, fabulous.

unbeliever, n. doubter, skeptic, infidel, free-thinker, nullifidian.

unbelieving, a. incredulous, doubtful, skeptical, nullifidian.

unbend, v. relax.

unbending, a. inflexible, unyielding, rigid, unpliant, resolute, incompliant.

unbiased, a. unprejudiced, impartial, unjaundiced, neutral, disinterested.

unbidden, a. unasked, uninvited; spontaneous, voluntary, volitional.

unblamable, a. blameless, inculpable, irreprehensible, innocent.

unblushing, a. shameless, unabashed, brazen-faced, indecent, immodest.

unbosom, v. confess, reveal, divulge.

unbounded, a. illimitable, boundless, unlimited, limitless, immeasurable, vast, infinite, immense.

unbreakable, a. infrangible; inviolable (said of a promise or vow).

unbreakableness, n. infrangibility; inviolability.

unbreathable, a. irrespirable.

unbridled, a. unrestrained, uncurbed, uncontrolled, licentious, immoderate.

unbroken, a. whole, intact; inviolate, inviolated; undisturbed, sound, profound; wild, untamed.

unburnable, a. incombustible, asbestic, incremable.

unbury, v. exhume, disentomb, disinter.

unburying, n. exhumation, disentombment, disinterment.

uncanny, a. weird, eerie.

uncanonical, a. apocryphal, unauthentic.

unceasing, a. incessant, perpetual, perennial, ceaseless.

unceremonious, a. informal, unconstrained; bluff, blunt.

uncertain, a. distrustful, hesitating; dubious, precarious, problematical, insecure; equivocal, ambiguous, indefinite, irresolute, inconstant, fickle, variable, capricious; fallible.

uncertainty, n. distrust, hesitation, doubt, dubiousness, dubiety, incertitude; irresolution, variableness, inconstancy, capriciousness; ambiguity, indefiniteness; contingency, fortuity; fallibility; suspense.

unchangeable, a. immutable, invariable, changeless, stereotyped, unalterable, unmodifiable, permanent, constant.

unchanging, a. unvarying, permanent.

uncharitable, a. illiberal, intolerant, ungenerous, bigoted, censorious.

unchaste, a. incontinent, impure, lewd, wanton, immoral.

unchastity, n. incontinence, wantonness, lechery, licentiousness, lewdness, impurity.

unchecked, a. unbridled, unrestrained, unhampered, untrammeled, uncurbed.