Ant. Certain, infallible, unerring, omniscient.
Fallow. Pale red or pale yellow; untilled, unsowed, neglected; inert, inactive, dormant; quiescent, idle, uncultivated, unproductive.
Ant. Cultivated, tilled, productive, worked, sown, prolific, operative, fruitful.
False. Untrue, mendacious, unveracious, lying; dishonest, perfidious, treacherous, faithless, disloyal, dishonorable, disingenuous, double-tongued, false-hearted, double-faced, two-faced; untrustworthy, untruthful, unreliable, truthless; spurious, counterfeit, forged, not genuine, feigned, sham, hypocritical, make-believe; incorrect, improper, erroneous, unfounded, wrong; fallacious, deceptive, deceiving, deceitful, delusive, misleading, disappointing; sophistical, mock, bogus, fabricated, unfaithful.
Ant. True, sound, correct, authentic, real, genuine, candid, conclusive, honorable, faithful.
Falsehood. Falsity, lie, fabrication, untruth, fiction, fib; imposture, counterfeit, cheat; fallacy, error, sophistry, forgery, deception.
Ant. Truth, verity, correctness, fact, genuineness, honesty, honor, reality, authenticity.
Falsify. Misrepresent, counterfeit, belie, misstate, garble; disprove, show unsound; violate; mistake, misinterpret, betray.
Ant. Verify, rectify, correct, check, certify, justify, expose, declare, exhibit, publish.
Falter. Hesitate, stutter, stammer; fail, quiver, tremble, totter; waver, be undecided, show weakness; halt, slip, dubitate, demur, flinch, vacillate.