Precaution

Previous caution or care; caution previously employed to prevent mischief or secure good; as, his life was saved by precaution.

A measure taken beforehand to ward off evil or secure good or success; a precautionary act; as, to take precautions against accident.

To warn or caution beforehand.

To take precaution against.

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"