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abnuentia

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

Latin > French (Gaffiot)

abnŭentĭa, æ, f., action de repousser [une accusation] : Ps. Aug. Rhet. 11.

Latin > German (Georges)

abnuentia, ae, f. (abnuo) = ἀπόφασις, die Verneinung, Abweisung, criminis, als rhet. Fig., Aur. Augustin. de rhet. p. 144, 2 ed. Halm.