Synonyms and Antonyms of mercurial
likely to change frequently, suddenly, or unexpectedly <the boss's mood is so mercurial that we never know how he's going to react to anything> Synonyms capricious, changeable, changeful, flickery, fluctuating, fluid, inconsistent, inconstant, fickle, mutable, skittish, temperamental, uncertain, unpredictable, unsettled, unstable, unsteady, variable, volatileRelated Words aimless, arbitrary, desultory, erratic, haphazard, hit-or-miss, irregular, random, scattered, slapdash, stray; ambivalent, hesitating, shaky, shilly-shally, shilly-shallying, vacillating, wavering; dicey, undependable, unreliable, untrustworthy; adaptable, mobile, protean, versatileNear Antonyms equable, even, uniform; abiding, durable, lasting, permanent, persistent; dependable, reliable, sure, tried, tried-and-true, true, trustworthy, trustyAntonyms certain, changeless, constant, immutable, invariable, predictable, settled, stable, stationary, steady, unchangeable, unchanging, unvarying
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