Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
* faecĕus, a, um, adj. [faex], impure, feculent; only flg.: nil ego istos moror faeceos mores, turbidos, quibus boni dedecorant sese, Plaut. Trin. 2, 2, 19.