temperamental

Synonyms

capricious, changeable, changeful, fickle, flickery, fluctuating, fluid, inconsistent, inconstant, mercurial, mutable, skittish, uncertain, unpredictable, unsettled, unstable, unsteady, variable, volatile;

Antonyms

certain, changeless, constant, immutable, invariable, predictable, settled, stable, stationary, steady, unchangeable, unchanging, unvarying;

Near Antonyms

equable, even, uniform;

abiding, durable, lasting, permanent, persistent;

dependable, reliable, sure, tried, tried-and-true, true, trustworthy, trusty;

Related 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, versatile;

Phrases

up in the air;