Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Sĭmŏīs, entis, m., = Σιμόεις, a small river in Troas that falls into the Scamander, now Mendere Tchai, Mel. 1, 18, 3; Plin. 5, 30, 33, § 124; Verg. A. 1, 100; 1, 618; 6, 88; Hor. Epod. 13, 14; Ov. M. 13, 324; Prop. 2, 9, 12.