Baretti: A dictionary of the English and Italian languages
Sventáre, v. a. to ventilate, give air, to fan, winnow. — grano, to winnow corn. — una vena, to breathe a vein, to let blood. — un disegno, &c., to baffle any design, &c. — una mina, to give vent to a mine, to counterwork or countermine it; v. n. to let the air escape (as from a balloon, &c.).