hĭlărus, a, um, adj., v. hilaris.
hilarus adj. with comp, cheerful, gay, merry, blithe, jocund, joyful: Hilarum fac te, ch...
An Elementary Latin Dictionary
Hĭlărus, i, m., name of a Roman freedman , Cic. Att. 1, 12, 2 et saep. ...
A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.