Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Nerthus, i, [Old Germ. nirdu; cf. Sanscr. narakas, underworld; Gr. ἔνεροι], f., a goddess of the ancient Germans, the Earth, Tac. G. 40, 4; v. Orell. ad h. l.