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.

unwavering, a. steadfast, resolute.

unwearied, a. indefatigable.

unweighable, a. imponderable.

unwholesome, a. baneful, insalubrious. See unhealthy.

unwieldy, a. ponderous, cumbersome, clumsy.

unwilling, a. reluctant, indisposed, loath, disinclined, averse.

unwind v. disentangle, unravel.

unwise, a. imprudent, injudicious, inexpedient, indiscreet.

unwittingly, adv. unknowingly, undesignedly, inadvertently.

unworthy, a. unmeritorious, undeserving, despicable, contemptible.

unwritten, a. traditional.

unyielding, a. inflexible, stiff, unbending, incompliant,
indomitable, insubmissive, tenacious, unimpressible, impliable, obdurate,
intractable, game, resolute.

upbraid, v. reproach, scold, chide, rate, reprove, reprimand, twit.

upbraiding, n. scolding, reproach, reprimand, censure, reprehension.

up grade. ascent, acclivity.

uphill, a. ascending, acclivous, rising.

uphold, v. support, sustain, vindicate, defend.

upkeep, n. maintenance.

upper, n. vamp (of a shoe).

upper-hand, n. advantage, mastery, dominion, control.

upper ten. (Co