= prevention, n. (in various senses).

Preventive action, esp. against attack or danger; a precautionary measure. Obsolete.

Precaution.

Caution exercised beforehand to avoid a danger or ensure a good result; prudent foresight.

Action intended to provide against an anticipated problem or danger; a defensive measure. Obsolete.

†(a) Caution, precaution (obsolete); (b) (with plural) a precaution (now rare).