Fickle
Old English ficol ‘deceitful’, of Germanic origin.
wiktionary
From Middle English fikil, fikel, from Old English ficol(“fickle, cunning, tricky, deceitful”), equivalent to fike + -le. More at fike.
From Middle English fikelen, from fikel(“fickle”); see above. Cognate with Low German fikkelen(“to deceive, flatter”), German ficklen, ficheln(“to deceive, flatter”).
etymonline
fickle (adj.)
c. 1200, "false, treacherous, deceptive, deceitful, crafty" (obsolete), probably from Old English ficol "deceitful, cunning, tricky," related to befician "deceive," and to facen "deceit, treachery; blemish, fault." Common Germanic (compare Old Saxon fekan "deceit," Old High German feihhan "deceit, fraud, treachery"), from the same source as foe.
Sense of "changeable, inconstant, unstable" is from c. 1300 (especially of Fortune and women). Related: Fickleness. Fickly (c. 1300) is rare or obsolete. Also with a verb form in Middle English, fikelen "to deceive, flatter," later "to puzzle, perplex," which survived long enough in Northern dialects to get into Scott's novels. Fikel-tonge (late 14c.) was an allegorical or character name for "one who speaks falsehoods."
