a. [ OE. fikel untrustworthy, deceitful, AS. ficol, fr. fic, gefic, fraud, deceit; cf. fācen deceit, OS. f&unr_;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;
They know how fickle common lovers are. Dryden.
n. The quality of being fickle; instability; inconsonancy. Shak. [ 1913 Webster ]