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δόμεν

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

French (Bailly abrégé)

1ᵉ pl. poét. ao.2 et inf. poét. ao.2 de δίδωμι.

Russian (Dvoretsky)

δόμεν: (αι) (= δοῦναι) эп. inf. aor. 2 к δίδωμι.