[syn: erratic, fickle, mercurial, quicksilver(a)]
The Collaborative International Dictionary of English v.0.48:
Fickle \Fic"kle\, a. [OE. fikel untrustworthy, deceitful, AS.
ficol, fr. fic, gefic, fraud, deceit; cf. f[=a]cen deceit,
OS. f?kn, OHG. feichan, Icel. feikn portent. Cf. Fidget.]
Not fixed or firm; liable to change; unstable; of a
changeable mind; not firm in opinion or purpose; inconstant;
capricious; as, Fortune's fickle wheel. --Shak.
[1913 Webster]
They know how fickle common lovers are. --Dryden.
Syn: Wavering; irresolute; unsettled; vacillating; unstable;
inconsonant; unsteady; variable; mutable; changeful;
capricious; veering; shifting.
[1913 Webster]
WordNet (r) 3.0 (2006):
fickle
adj 1: marked by erratic changeableness in affections or
attachments; "fickle friends"; "a flirt's volatile
affections" [syn: fickle, volatile]
2: liable to sudden unpredictable change; "erratic behavior";
"fickle weather"; "mercurial twists of temperament"; "a
quicksilver character, cool and willful at one moment,
utterly fragile the next" [syn: erratic, fickle,
mercurial, quicksilver(a)]