P. and V. δεινός, φοβερός, φρικώδης, V. δύσχιμος, ἔμφοβος, σμερδνός.
ugly: P. and V. αἰσχρός, δυσειδής (Plato and Sophocles, Fragment), V. δύσμορφος, δυσθέατος; see ugly.
