horrĭpĭlo — Lewis & Short
horrĭpĭlo, āre, v. n.horreo-pilus,
I to bristle with hairs, be shaggy (post-class.):
aures immodicis horripilant auctibus,App. M. 3, p. 140: horripilo o)rqotrixa/w, horripilatur o)rqotrixei=, Gloss. Philox.