Lewis Short
(adjective) : per-cōpĭōsus, a, um, , very abundantly supplied;
* Hence,very rich in expression, very copious,Plin. Ep. 9, 31, 1; Sid. Ep. 1, 1.—Adv.: percōpĭōsē, very copiously, Sid. Ep. 4, 7 fin.
Charlton T. Lewis, Charles Short, A Latin Dictionary