appetiteyoudaoicibaDictYouDict[appetite 词源字典]
appetite: [14] In its origins, appetite referred to a very generalized desire or inclination; the wish for food is a secondary development. The Latin noun was appetītus, a derivative of the compound verb appetere ‘strive after, desire eagerly’, which was based on petere ‘go to, seek out’ (source also of English compete, impetus, petition, and repeat, and related to feather).
=> compete, impetus, petition, repeat[appetite etymology, appetite origin, 英语词源]
appetite (n.)youdaoicibaDictYouDict
c. 1300, "craving for food," from Anglo-French appetit, Old French apetit (13c.) "appetite, desire, eagerness," from Latin appetitus "appetite," 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" (see petition (n.)).

Of other desires or cravings, from late 14c. As an adjective form, OED lists appetitious (1650s) and appetitual (1610s) as "obsolete," but appetitive (1570s) continues.