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tecum

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

Latin > English (Lewis & Short)

tēcum: i. e. cum te; v. tu.

Latin > French (Gaffiot)

(1) tēcum, = cum te, avec toi, v. cum.