berm
Concise Oxford English Dictionary © 2008 Oxford University Press:
berm /bəːm/
▶noun a raised bank or flat strip of land bordering a river, canal, or road.
■ an artificial ridge or embankment.
■ a narrow ledge, especially one between a ditch and the base of a parapet.
– origin C18 (denoting a narrow space): from Fr. berme.
'berm' also found in these Oxford entries:

