variable inconsistent unsettled unstable changeable fluctuate mutable uncertain unsteady volatile changeful fickle mercurial temperamental unreliable capricious erratic irregular vary change shift uneven waver wayward flickery fluid labile skittish unfixed unpredictable vacillate flighty fluctuant irresolute undependable vagarious flicker impulsive intermittent peaky waffle protean fitful kaleidoscopic whimsical random quicksilver mobile spasmodic sporadic flaky moody movable desultory patchy excitable chameleonic giddy turbulent irrepressible spotty unequal haphazard occasional active elastic unsystematic episodic oscillate discontinuous episodical move unmethodical flexible untrustworthy faithless fragmentary versatile adaptable float alterable choppy casual aperiodic disconnected indefinite arbitrary ramble swaying impermanent dynamic wild reckless dubious freakish aimless adjustable nonuniform untrue disreputable