Safeguard
WordNet
noun
(1) A precautionary measure warding off impending danger or damage or injury etc.
"He put an ice pack on the injury as a precaution"
"An insurance policy is a good safeguard"
"We let our guard down"
(2) A document or escort providing safe passage through a region especially in time of war
verb
(3) Make safe
(4) Escort safely
WiktionaryText
Noun
- something that serves as a guard or protection; a defense
- Getting a flu shot is a good safeguard against illness.
- a safe-conduct, especially in time of war