Word Origin & History
fickleO.E. ficol "deceitful," related to befician "deceive," and to facen "deceit, treachery." Common Gmc. (cf. O.S. fekan, O.H.G. feihhan "deceit, fraud, treachery"), from PIE *peig- "evil-minded, treacherous, hostile" (cf. L. piget "it irks, troubles, displeases," piger "reluctant, lazy"). Sense of "changeable"
is first recorded late 13c. Related: Fickleness.