[Middle English, variant of hidous, from Anglo-Norman and Old French hideus, hisdeus, probably from Old French hisde, hide, horror, fright (probably from alteration, with expressive initial h, of Frankish *egisida, fright, from Germanic *agisōn, from *agiz, fear), or perhaps from Vulgar Latin *hispidōsus, horripilating (from Latin hispidus, rough, shaggy, bristly; probably akin to hirsūtus, hairy, hirsute).]