I.v. n. inch. [valeo], to become strong; only trop.
II. To increase, prevail, predominate: “libido atque luxuria invaluerat,” Suet. Vesp. 11: “appellatio grammaticorum invaluit,” id. Gramm. 4: “amor,” Plin. Ep. 6, 8, 2: “consuetudo,” id. ib. 6, 2, 5: “vitiis invalescentibus,” Suet. Ner. 27: “consuetudo cotidie magis invalescit,” Quint. 2, 1, 1: “hic effectus (opp. nihil efficit),” id. 6, 1, 44.—
III. To come into use: “verba intercidunt, invalescuntque temporibus,” Quint. 10, 2, 13.