horripilate
To bristle in fear or horror; to have goose bumps or goose pimples.
Another volume of ghost stories by Mrs. [Catherine] Crowe!—as grim and horrifying as the "Night Side of Nature," which sends one to bed with a shudder, and lends an awful deliberation to the act of putting out the candle. These pages would literally be frightful if they were not at the same time fascinating. You never know at what turn in the narrative to look for the sudden bit of description, which is to thrill the nerves and horripilate the forehead.
Where it comes from
From Late Latin horripilātus, perfect passive participle of horripilō (“(of hairs) to bristle”) (see -ate (verb-forming suffix)), from horreō (“to bristle, shiver, dread”) + pilus (“hair”) + -ō (first conjugation verb-forming suffix), ultimately from Proto-Indo-European *ǵʰers- (“to bristle”).
Adapted from the Wiktionary entry horripilate (CC BY-SA 4.0).