vervago

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.

vervăgo, ĕre, v. a. [etym. unknown; acc. to Plin. 18, 19, 49, § 176, from ver-ago],

to break up land, i. e. to plough land for the first time after its lying fallow : agros, Col. 11, 2, 8.