After all, some young men are not so fickle as others; but even if he's the ficklest, there is consolation.
c.1200, probably from Old English ficol "deceitful, cunning, tricky," related to befician "deceive," and to facen "deceit, treachery." Common Germanic (cf. Old Saxon fekan "deceit," Old High German feihhan "deceit, fraud, treachery"), from PIE *peig- "evil-minded, treacherous, hostile" (cf. Latin piget "it irks, troubles, displeases," piger "reluctant, lazy"). Sense of "changeable" is first recorded late 13c. Related: Fickleness.