safeguard
Concise Oxford English Dictionary © 2008 Oxford University Press:
safeguard/ˈseɪfɡɑːd/
▶noun a measure taken to protect or prevent something. ▶verb protect with a safeguard.
– origin ME: from OFr. sauve garde, from sauve ‘safe’ + garde ‘guard’.
'safeguard' also found in these Oxford entries:

