Safeguard

One who, or that which, defends or protects; defense; protection.

A convoy or guard to protect a traveler or property.

A pass; a passport; a safe-conduct.

To guard; to protect.

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"

make safe