Lewis Short
(verb) : prae-saepĭo (-sēpĭo), psi, ptum, 4
* To fence in front, to block up, barricade (class.): aditus atque itinera trabibus,Caes. B. C. 1, 27: loca montuosa sublicis,id. ib. 3, 49: omni aditu praesaepto,id. B. G. 7, 77.
Charlton T. Lewis, Charles Short, A Latin Dictionary