unshrinking, a. unflinching, determined, resolute.

unsightly, a. offensive, repulsive.

unskilled, a. unpracticed, unskillful, empirical.

unskillful, a. maladroit, inexpert, unskilled, clumsy.

unsociable, a.morose, uncompanionable, inaffable, ungenial, taciturn.

unsolvable, a. insoluble, inexplicable.

unsophisticated, a. unadulterated; innocent, guileless, gullible, ingenuous.

unsound, a. defective, impaired; sophistical, fallacious, illogical, untenable.

unsparing, a. liberal, ungrudging, profuse; severe, unmerciful.

unspeakable, a. ineffable, unutterable, inexpressible.

unspotted, a. spotless, pure.

unstable, a. insecure, unsteady, irresolute, inconstant, erratic.

unsteadfast, a. unstable, inconstant, wavering, irresolute.

unsteady, a. inconstant, precarious, wavering, variable, vacillating, wabbly.

unstinted, a. plentiful.

unstudied, a. extemporaneous, extempore, impromptu, offhand.

unsubmissive, a. insubordinate, refractory.

unsuccessful, a. unfortunate, unlucky, unprosperous; abortive, fruitless, unavailing, bootless, ineffectual, futile.

unsuitable, a. inappropriate, incongruous, incompatible.

unsupplied, a. destitute.

unsurmountable, a. insuperable.

unsurpassed, a. peerless, transcendent, superior, unrivaled, matchless.

unsusceptible, a. unimpressionable, unfeeling.

unsuspecting, a. unsuspicious, gullible, credulous, indubious, unsophisticated.

unsustainable, a. untenable, controvertible.

untangle, v. unravel, disentangle.

untaxed, a. scot-free, exempt.

unteachable, a. indocile, intractable.

unthankful, a. ungrateful.

unthankfulness, n. ingratitude.

untidy, a. disorderly, slatternly, littered.

untillable, a. inarable.

unfilled, a. fallow.

untimely, a. premature, unseasonable, inopportune, ill-timed, malapropos.

untiring, a. indefatigable, unceasing, tireless, unremitting, unwearied.

untrodden, a. trackless, pathless.

untrue, a. inveracious, mendacious, false, untruthful, unfaithful.

untruth, n. falsehood, fiction, fabrication, lie.

untruthful, a. inveracious, mendacious, lying.

untruthfulness, n. mendacity, inveracity, falsehood.

untwist, v. unravel, disentangle, feaze.

unused, a. unaccustomed, unfamiliar.

unusual, a. uncommon, curious, rare, odd, unique, extraordinary, anomalous, irregular.

unutterable, a. unspeakable, ineffable.

unvarying, a. invariable, monotonous, uniform.

unveil, v. expose, uncover, reveal, disclose.

unviolated, a. inviolate, inviolated, inviolable.

unwarrantable, a. unjustifiable, indefensible.