Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
con-vestĭo, īvi, ītum, 4 (arch. inf. pass. convestirier, Poët. ap. Cic. Tusc. 1, 28, 69), v. a., to clothe, cover with clothing (rare, and mostly in ante-class. poetry).