Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Aenēĭus, a, um (quadrisyl.), adj. [Aeneas], of or pertaining to Æneas: nutrix, Verg A. 7, 1: virtus, Ov. M. 14, 581: pietas, id. F. 4, 799: fata, his death, Stat S. 5, 3, 37.