perterrĭcrĕpus, a, um, adj. [perterreo-crepo],
that clatters or rattles most terribly (ante-class.); old poët. ap. Cic. Or. 49, 164: sonitus, Lucr. 6, 129.
perterricrepus adj. perterreo+CRAP-, rattling terribly , Poët. ap. C. ...
An Elementary Latin Dictionary