Lewis Short
(verb) : compĕrĭor (conp-), īri, pertus sum, 4, , collat. form of comperio, q. v.
* To ascertain, learn, obtain certain knowledge that, etc. (rare); constr. mostly with acc. and inf.: dum ne ab hoc me falli comperiar,Ter. And. 5, 3, 31; Sall. J. 45, 1; 108, 3; Tac. A. 4, 20; Gell. 3, 3, 1: quid comperior?App. M. 2, p. 124, 11; perf., Tert. adv. Herm. 28.
Charlton T. Lewis, Charles Short, A Latin Dictionary