Appetite
Middle English: from Old French apetit (modern appétit ), from Latin appetitus ‘desire for’, from appetere ‘seek after’, from ad- ‘to’ + petere ‘seek’.
wiktionary
From Middle English appetit, from Old French apetit (French appétit), from Latin appetitus, from appetere(“to strive after, long for”); ad + petere(“to seek”). See petition, and compare with appetence.
etymonline
appetite (n.)
c. 1300, "craving for food," from Anglo-French appetit, Old French apetit "appetite, desire, eagerness" (13c., Modern French appétit), from Latin appetitus "appetite, longing," literally "desire toward," from appetitus, past participle of appetere "to long for, desire; strive for, grasp at," from ad "to" (see ad-) + petere "go to, seek out," from PIE root *pet- "to rush, to fly."
Formerly with of or to, now with for. Of other desires or cravings, from late 14c. As an adjective, "characterized by appetite," OED and Century Dictionary list appetitious (1650s) and appetitual (1610s) as obsolete, but appetitive (1570s) continues.
