Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
dis-cŭpĭo, ĕre, v. n. (in famil. lang. for vehementer cupio), to desire greatly, to long for: discupio dicere, Plaut. Trin. 4, 2, 87: te videre, Cael. ap. Cic. Fam. 8, 15, 2: se vendere, Cat. 106, 2.