persibus

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.

per-sĭbus, a, um, adj. [sibus, callidus sive acutus, Fest. p. 336],

very knowing , very acute , Plaut. and Naev. ap. Fest. p. 217 Müll.; cf. Naev. ap. Varr. L. L. 7, § 107 Müll.