unproductive, a. [unfruitful], [barren].
unprofessional, a. amateur.
unprofitable, a. unremunerative, profitless; [futile], [fruitless], [unavailing].
unpromising, a. [unlikely]; inauspicious, unpropitious.
unqualified, a. [incompetent], [ineligible]; [absolute], [unconditional].
unquenchable, a. unslakable, insatiate, [insatiable], [quenchless].
unquestionable, a. incontrovertible, irrefutable, incontestable, indubitable, [obvious], [indisputable].
unquestioned, a. [undoubted], implicit.
unravel, v. disentangle, extricate, [ravel]; decipher, [unfold].
unreachable, a. inaccessible.