noun

care taken to avoid danger or mistakes.

anyone receiving a suspect package should exercise extreme caution

care,carefulness,wariness,awareness,heedfulness,heed,attention,attentiveness,alertness,watchfulness,vigilance,circumspection,discretion,prudence,guardedness,chariness,forethought,mindfulness,caginess

verb

say something as a warning.

the Chancellor cautioned that economic uncertainties remained