Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
bĭpennĭfer, fĕra, fĕrum, adj. [2. bipennis-fero], bearing a two-edged axe (only in Ov.): Lycurgus, Ov. M. 4, 22; id. Tr. 5, 3, 39: Arcas, id. M. 8, 391.