Lewis & Short

cōpĭor, āri, v. dep. [1. copia]; milit. t. t. (cf. Gell. 17, 2, 9), to furnish or provide one’s self abundantly with something: Romani multis armis et magno commeatu praedāque ingenti copiantur, Quadrig. ap. Gell. l. l., and Cael. ap. Non. p. 87, 8.