Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
proelĭo, āre, 1, v. a. (ante-class.; collat. form of proelior): mortales inter sese pugnant, proeliant, Enn. ap. Non. 472, 31 (Trag. v. 26 Vahl.); cf. Prisc. p. 799 P.—