ob-languesco, gŭi, 3,
v. inch. n., to become feeble or languid, to languish : litterulae meae oblanguerunt, Cic. Fam. 16, 10, 2.
ob-languēscō guī, —, ere, inch, to become feeble, languish: litterulae meae oblanguerunt. ...
An Elementary Latin Dictionary