vāllō āvī, ātus, āre
vallum, to fortify with a rampart, surround with palisades, intrench, circumvallate : castra, L.: noctem, i. e. intrench themselves at night , Ta.—Fig., to fortify, protect, defend : Pontus et naturā et regione vallatus: haec omnia quasi saepimento aliquo vallabit disserendi ratione: Catilina vallatus sicariis.