horrĭfĭcus — Lewis & Short
horrĭfĭcus, a, um, adj.horror-facio,
I that causes tremor or terror, terrible, dreadful, frightful, horrific (poet. and in postAug. prose):
bustum,Lucr. 3, 906:
letum,Verg. A. 12, 851:
ruinae (Aetnae),id. ib. 3, 571:
lapsu (Harpyiarum),id. ib. 3, 225:
fulmen,Val. Fl. 2, 97:
acta,id. 3, 423:
caesaries,Luc. 2, 372:
poena,Gell. 20, 1 fin.— Adv.: horrĭfĭcē, in a manner to cause dread, with affright:
horrifice fertur divinae Matris imago,Lucr. 2, 609; 4, 36.