Ar. and P. τερατώδης.
ominous: P. and V. κακός, δύσφημος (Plato but rare P.).
extraordinary: P. and V. θαυμαστός, ἐξαίσιος (Plato), Ar. and P. δαιμόνιος, θαυμάσιος; see extraordinary.
terrible: P. and V. δεινός.
