Old English weall, Anglian wall "rampart, dike, earthwork" (natural as well as man-made), "dam, cliff, rocky shore," also "defensive fortification around a city, side of a building," an Anglo-Frisian and Saxon borrowing (Old Saxon, Old Frisian, Middle Low German, Middle Dutch wal) from Latin vallum "wall, rampart, row or line of stakes," apparently a collective form of vallus "stake," from PIE *walso- "a post."

From Middle English wal, from Old English weall (“wall, dike, earthwork, rampart, dam, rocky shore, cliff”), from Proto-West Germanic *wall (“wall, rampart, entrenchment”), from Latin vallum (“wall, rampart, entrenchment, palisade”), from Proto-Indo-European *welH- (“to turn, wind, roll”).

The term wall comes from the Latin vallum meaning "an earthen wall or rampart set with palisades, a row or line of stakes, a wall, a rampart, fortification", while the Latin word murus means a defensive stone wall.