ăcesco

I. v. inch. [aceo], to become sour, to turn sour: quodcumque infundis acescit, Hor. Ep. 1, 2, 54: lac, Plin. 20, 14, 53: musta, id. 7, 15, 13; id. 11, 16, 15, § 45; 11, 35, 41; Dig. 18, 1, 9, § 2 al.