Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
* sĭcĭlisso or sĭcĕlisso, āre, v. n. [Siculi], to imitate Sicilian manners: hoc argumentum graecissat: tamen Non atticissat, verum sicelissat, Plaut. Men. prol. 8; v. Ritschl ad h. l.