per-pāco, āvi, ātum, 1, v. a.,
to quiet completely , reduce to quiet (i. q. perdomare): omnibus perpacatis, Liv. 36, 21: Brennos perpacavit, Flor. 4, 12, 4; Aur. Vict. Vir. Ill. 33.
per-pācō —, ātus, āre, to quiet completely, pacify thoroughly: omnibus perpacatis, L. ...
An Elementary Latin Dictionary