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δεινώ

Γελᾷ δ' ὁ μωρός, κἄν τι μὴ γέλοιον ᾖ -> The fool laughs even when there's nothing to laugh at
Menander

Greek Monolingual

δεινῶ (-όω) (Α) δεινός
παριστάνω κάτι φοβερότερο απ' ό,τι είναι, μεγαλοποιώ.