languĕfăcĭo, fēci, factum, 3, v. a. [langueo-facio],
to make faint, weary, languid : incitare languentes et languefacere excitatos, Cic. Leg. 2, 15, 38.
languefaciō —, —, ere langueo+facio, to make faint, weary : excitatos. ...
An Elementary Latin Dictionary