perasper
Could not find perasperum in Logeion dictionaries.
perasperum neuter nominative singular, neuter accusative singular, neuter genitive plural, neuter vocative singular, masculine genitive plural, masculine accusative singular of perasper
pĕr-asper, ĕra, ĕrum, adj.,
- very rough, Cels. 5, 28, 14: montes, Jul. Rer. Gest. Alex. 3, 51.
per-asper, era, erum, sehr rauh, Cels. 5, 28, 14: perasperi inviique montes, Iul. Val. 3, 51 (28).
pĕraspĕr, ĕra, ĕrum, très rude au toucher : Cels. Med. 5, 28, 14.