Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
2. Nemĕa, ae, m., a river flowing between the territories of Corinth and Sicyon, Liv. 33, 15.‡ † nēmen, ĭnis, n., = νῆμα, a yarn, thread: trino de nemine fati, Inscr. Grut. 690, 5; cf. nema.