Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Jānŭālis, e, adj. [Janus], of or belonging to Janus: versus Januales (al. Janulii), Paul. ex Fest. s. v. axamenta: Janualis porta dicta ab Jano: et ideo ibi positum Jani signum, et jus institutum a Numa Pompilio, ut scribit in annalibus L. Piso, ut sit clausa semper, nisi cum bellum sit, Varr. L. L. 5, § 165; cf. Ov. F. 1, 127; Macr. S. 1, 9.