known, impossible to predict or tell; questionable, Inf. iffy, doubtful, dubious, in doubt; uncertain, Inf fluky, unsure, undecided, up in the air, in the balance; indefinite, vague, obscure, hazy; erratic, fickle, capricious, whimsical, vicissitudinous, mercurial, changeable, impulsive, impetuous; undependable, unreliable, wavering, veering; chance, aleatory, accidental, unexpected, unanticipated, unguessed-at, unhoped-for, undreamed-of.
unprejudiced, adj. impartial, unbiased, fair, just, open-minded, broad-minded; uninfluenced, unswayed, unjaundiced, unbigoted, color-blind; broad, wide, latitudinarian, unparochial, unprovincial, catholic; even-handed, objective, equitable, disinterested, detached; dispassionate, neutral, indifferent, unprepossessed, third-party, independent; impersonal, unimpassioned, judicial; unopinionated, undogmatic, liberal, unhidebound.
unpremeditated, adj. unstudied, undeliberated, unthought-out; unplanned, unplotted, unarranged, undesigned, unschemed, uncontrived; unintentional, unintended, unpurposive, undeliberate; unconscious, involuntary, automatic, immediate, instinctive, natural; unprepared, extemporaneous, extempore, impromptu, ad-lib, improvised, improvisational, improvisatory, off-the-cuff, off-the-top, shooting-from-the-hip, offhand; spontaneous, spur-of-the-moment, on-the-spot; impulsive, impetuous, madcap, hasty, rash, devil-may-care, reckless, blind.
unprepared, adj. 1. unready, Inf. caught short, caught napping, taken off guard, surprised, caught by surprise, taken aback, dumfounded, abashed; disorganized, at sixes and sevens, not set up, confused, jumbled, muddled.
2. untrained, unskilled, ignorant, green, raw, new to, innocent as a baby; inexperienced, unseasoned, unpracticed, unqualified.
3. unfinished, uncompleted, incomplete, just started, inchoate; half-baked, undeveloped, SI. half-assed, half-cocked, ill-prepared, ill-considered, not thought out, unplanned.
4. extemporaneous, ad-lib, off-the-cuff, informal, casual, random.
unpretentious, adj. simple, modest, unaffected, humble, unpretending; plain, open, direct, unassuming, straightforward, candid; unartificial, natural, unfeigning, honest; unembellished, unornamented, undecorated, ungarnished, untrimmed, unadorned; unsophisticated, unostentatious, undistinguished, simple, homely; unambitious, unaspiring, unimposing, unobtrusive; artless, homespun, native, unspoiled.
unprincipled, adj. dishonest, deceitful, tricky, dissembling, unscrupulous; unconscionable, unethical, unprofessional, amoral, immoral, shameless; corrupt, crooked, underhand, underhanded, bad, wicked; knavish, roguish, scoundrelly, blackguardly, villainous; dishonorable, false-hearted, untrustworthy, faithless, false; treacherous, perfidious, unloyal, disloyal; sinister, devious, shifty, Inf. shady, not kosher; unfair, unjust, inequitable, wrongful, felonious; collusive, hypocritical, two-faced, double-tongued, Janus-faced.
unproductive, adj. 1. fruitless, unfruitful, unyielding, issueless; childless, sterile, barren, abortive, infe-cund, unprolific, fallow, Bot. acarpous, impotent, effete; dead, dry, arid.
2. useless, futile, vain, idle, unavailing, bootless; ineffectual, ineffective, inefficacious, inadequate, inoperative, unserviceable, impracticable; worthless, valueless, meritless, nugatory; unprofitable, profitless, unremunerative, unrewarding, unpaying, gainless; unsuccessful, Inf. no-go, to no avail, to no purpose, for naught.