Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
lĭbīdĭnor (lŭbīd-), āri, v. dep. [id], to indulge or gratify lust (post-Aug.): cum libidinatur, Mart. 7, 67, 13: inceste libidinari, Suet. Ner. 28 fin.: abeunt libidinatum ad filias Moab, Tert. ad Gnost. 3; Petr. 138, 7.