Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
appĕtentĭa (adp-), ae, f. [appeto], a longing after something, appetite: adpetentia cibi, Plin. 19, 8, 38, § 127: liberalium artium, id. 23, 1, 22, § 38: gloriae, Aur. Vict. Epit. 15.
Without gen., desire, longing: libido effrenatam (efficit) adpetentiam, Cic. Tusc. 4, 7, 15.