Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Mĭnervālis, e, adj. [Minerva], of or belonging to Minerva (to learning, good sense, etc.), Minervan (post-class.): artes, Tert. Spect. 11 fin.: munus, Hier. Ep. ad Ephes. 6, 4: MAGISTER, Inscr. Orell. 2421.
In plur. subst.: Mĭnervālĭa, ĭum, n., festivities in honor of Minerva, Sergius, p. 1846 P