φθείρειν

From LSJ

γελᾷ δ' ὁ μωρός, κἄν τι μὴ γέλοιον ᾖ → the fool laughs even when there's nothing to laugh at

Source

Greek > English (Woodhouse Verbs Reversed)

(see also φθείρω): destroy, impair, ruin

Lexicon Thucydideum

vastare, perdere, to ravage, ruin, 1.23.3, 1.30.3, 1.69.5, 1.141.7. 2.11.6. 2.57.1, 2.58.2. 2.91.1. 2.101.5. 3.85.4, 3.93.2. 3.93.3, 3.116.1 (de Aetna concerning Aetna), 4.61.1, 4.66.1. 92. 5.51.2. 6.34.8. 6.82.4, 8.46.5,
item likewise 8.50.2. item likewise 8.85.2.
PASS. 1.2.4, 1.24.4, 1.24.6. 1.82.3, 1.110.1, 1.141.7, 2.99.5, [vulgo commonly διεφθάρησαν]. 3.13.3, 3.39.8,
item likewise 3.46.3. 3.92.2, 3.39.3, [vulgo additur commonly added πολέμῳ] 5.52.1 (de Heraclea concerning Heraclea), 7.12.3, 7.13.2, 7.48.5, 8.78.1.