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δεσμόν

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

French (Bailly abrégé)

οῦ (τό) :
seul. pl. δεσμά;
c. δεσμός.

English (Strong)

or desmos neuter and masculine respectively from δέω; a band, i.e. ligament (of the body) or shackle (of a prisoner); figuratively, an impediment or disability: band, bond, chain, string.