Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
expĕtesso (-isso), ĕre, v. intens. a. [id.], to desire, long for (a Plautinian word): quae te amat tuamque expetessit pulcram pulcritudinem, Plaut. Mil. 4, 1, 13: cf. id. ib. 4, 6, 14: artem, id. Trin. 2, 1, 6; id. Rud. 1, 5, 1: ultro amas, ultro expetessis, Plaut. As. 3, 1, 23.