urvo — Lewis & Short
urvo (urbo), āre, v. n.urvum,
I to plough round, mark out with a plough:
urvat, Ennius in Andromedā significat circumdat, ab eo sulco, qui fit in urbe condendā urvo aratri ... Ait autem: Circum sese urvat ad pedes, etc.,Fest. p. 375 Müll. N. cr. (Trag. v. 141 Vahl.); cf.:
urvare est aratro definire,Dig. 50, 16, 239, § 6.