Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
† prōrēta, ae, m., = πρωράτης, the lookout man at the prow, the under-pilot (anteand post-class.): si tu proreta isti navi es, ego gubernator ero, Plaut. Rud. 4, 3, 75; Dig. 39, 4, 11.