v. [UNDER-1 8 b, 10 a.] trans. To buy at less than the actual value, or for less than another. Hence Underbuying vbl. sb.
a. 1614. Fletcher, Valentinian, II. iv. Madam ye have a witty woman. Mar. Two Sir, Or else ye underbuy us.
c. 1630. Sanderson, Serm. (1681), II. 274. The underbuying of commodities far below the worth.