O / ob-vallo
verb transitive

ob-vallo

2nd PP ob-vallāre · 3rd PP ob-vallāvi · 4th PP ob-vallātum · conj. 1st
to surround with a wall; rampart; to fortify; intrench
to surround with a wall or rampart; to fortify, intrench.
Lit.: urbem, Paul. ex Fest. s. v. ob, p. 179 Müll.—*
figuratively
Trop.: locus omni ratione obvallatus. Cic. Agr. 2, 1, 3.