frightful Copy link Outline 1. terrĭbĭlis, terrĭfĭcus2. foedus (of any thing revolting, offensive) • frightful: 1. terrĭbĭlis, terrĭfĭcus: v. terrible. 2. foedus (of any thing revolting, offensive): a f. gash, f. cicatrix, Hor. S. 1, 5, 60: a f. wound, f. vulnus, Ov. Met. 12, 366: Liv.: a f. tempest, f. tempestas, Flor. 3, 5, 18: cf. Liv. 21, 58, foeditas Alpium.