pergaudeo

Εὐφήμει, ὦ ἄνθρωπε· ἁσμενέστατα μέντοι αὐτὸ ἀπέφυγον, ὥσπερ λυττῶντά τινα καὶ ἄγριον δεσπότην ἀποδράς → Hush, man, most gladly have I escaped this thing you talk of, as if I had run away from a raging and savage beast of a master

Latin > English (Lewis & Short)

per-gaudĕo: ēre, v. n.,
I to rejoice greatly: Trebonium meum a te amari pergaudeo, Cic. Q. Fr. 3, 1, 3, § 9.