Lewis & Short

culpābĭlis, e, adj. [culpa], worthy of blame, culpable, criminal (post-class.): aliquid (opp. laudabile), App. Mag. p. 223: opinio de diis (opp. digna), Arn. 7, p. 222.
Comp.: tanto culpabilius est, non observare quod possis, Tert. ad Uxor. 2, 1.
Adv.: culpābĭlĭter, culpably, Symm. Ep. 9, 40.
Comp., Paul. Nol. Ep. 39, 4; Cael. Aur. Acut. 3, 17, 172.