This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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adj. Changing or varying, especially often and without discernible pattern or reason.

adj. Fickle; faithless.

adj. Not constant; wavering.

adj. Not constant; not stable or uniform; subject to change of character, appearance, opinion, inclination, or purpose, etc.; not firm; unsteady; fickle; changeable; variable; -- said of persons or things.

Not constant; subject to change; not firm; unsteady; fickle; capricious: said chiefly of persons: as, inconstant in love or friendship.

Synonyms Unstable, vacillating, wavering, volatile, unsettled, uncertain.

adj. likely to change frequently often without apparent or cogent reason; variable

"I have heard him called inconstant of purpose — when he deserted, for the sake of love, the hope of sovereignty, and when he abdicated the protectorship of England, men blamed his infirmity of purpose."

volatile    untrue    false    fickle   

volatile    unstable    fluctuating    wavering    unsteady    mutable    variable    changeable    fickle   

fickle    changeable    irresolute    unreliable    mercurial    headstrong    flighty    unstable    fitful    crotchety