Lewis Short
păvesco, ĕre
* V. inch. n. and a. [paveo] (mostly post-Aug.).
* Neutr., to begin to be afraid, to become alarmed: omni strepitu pavescere,Sall. J. 72, 2: ad ejusmodi tactum,Col. 6, 2: ad nocturnas imagines,Plin. 29, 4, 20, § 67 (al. expavescere): pavescere sensim et quasi albescere,Gell. 19, 1, 21.
* Act., to begin to fear or dread, to begin to be alarmed at: bellum,Tac. A. 1, 4: prodigia deūm,Sil. 16, 127.
Charlton T. Lewis, Charles Short, A Latin Dictionary