Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
proelĭāris (prael-) and proelĭā-lis, e, adj. [proelium], of or belonging to a battle (ante- and post-class.): pugnae proeliares, pitched battles, Plaut. Curc. 4, 4, 17: acies, App. M. 8, p. 208, 40: proeliares dies appellantur, quibus fas est hostem bello lacessere, Paul. ex Fest. p. 266 Müll.; called also proeliales dies, Macr. 1, 16: proeliaris dea, i. e. Minerva, App. M. 10, p. 254, 21.
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.—
proelĭor (prael-), ātus, 1, v. dep. n. [proelium], to join battle, to engage in battle, fight (class.).