Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
† hexēris, is, f., = ἑξήρης (ναῦς), a vessel with six banks of oars, Liv. 37, 23, 5; 29, 9, 8.
Abl. hexere, Val. Max. 1, 8, ext. 11.