Lewis Short
(adjective) : laetābĭlis, e, laetor
* Joyful, glad, gladsome (class.): quid habet ista res aut laetabile, aut gloriosum?Cic. Tusc. 1, 21, 49: nihil laetabile,id. ib. 4, 17, 37: factum,Ov. M. 9, 255: sidus alicui,Val. Fl. 6, 606.— Comp., Mamert. Genethl. 18.
Charlton T. Lewis, Charles Short, A Latin Dictionary