Lewis & Short

expergo, gi, gĭtum, 3, v. a., to awaken, rouse up (cf. Paul. ex Fest. p. 80 Müll.; ante- and post-class.).

  1. I. Lit.: omnes vocis expergit sono, Santra ap. Non. 104, 16 (Com. 4 Rib. p. 228): expergite pectora tarda sopore, Att. ib.: nec quisquam expergitus exstat, awakens (from death), Lucr. 3, 929; Arn. 5, 1.
  2. II. Transf.: istā re juvenum animos expergebat, Gell. 6, 10, 1: animus expergitus, App. Mag. p. 302.
    Hence, expergĭtē, adv., vigilantly, watchfully, actively: auscultare, App. M. 8 fin.: obire munus, id. ib. 2, p. 125, 6.