"precaution" in the noun sense
1. precaution, safeguard, guard
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. precaution
the trait of practicing caution in advance
3. caution, precaution, care, forethought
judiciousness in avoiding harm or danger
"he exercised caution in opening the door"
"he handled the vase with care"
Source: WordNet® (An amazing lexical database of English)
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