Graus, n., ‘horror, dread,’ from MidHG. grûs, m., ‘dread, terror’; allied to ModHG. grausen, MidHG. grûsen, griusen, OHG. grûwisôn, grûsôn, ‘to be terrified’; formed from the suffix -isôn and the root grû. See Gräuel, where grausam is also discussed.