Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Subi, m. indecl., a river of Spain, Plin. 3, 3, 4, § 21.
Called also Subis, is, m., Mel. 2, 6.
1. subis, is, f., a kind of bird that breaks eagles’ eggs, otherwise unknown, Nigid. ap. Plin. 10, 14, 17, § 37.
2. Subis, is, m., v. Subi.