adjective
1.
lacking firmness or steadiness (as in purpose or devotion)
depended too much on an inconstant friend
Synonyms: capricious, changeable, fickle, inconsistent, lubricious, mercurial, temperamental, ticklish, uncertain, unstable, variable, volatile; compare changeable 1, mutable 2, uncertain 1
Related Word: changeful, mutable, protean, unsettled, unsteady; elusive, erratic, vacillating, vagrant, wavering, wayward; irresolute, shifty, shilly-shally; undependable, unreliable; disloyal, faithless, false, perfidious, traitorous, treacherous, untrue; frivolous, light, light-minded
Contrasted words: dependable, reliable, trustworthy, trusty; faithful, loyal, resolute, staunch, steadfast, true
Antonyms: constant
2.
Synonyms: mutable 2, changeable, shifty, slippery, uncertain, unstable, unsteady, variable
Antonyms: constant