caution

caution is a Noun

Definition:

[1] A careful attention to the probable effects of an act, in order that failure or harm may be avoided; prudence in regard to danger; provident care; wariness.

[2] Security; guaranty; bail. [R.] The Parliament would yet give his majesty sufficient caution that the war should be prosecuted. Clarendon.

[3] Precept or warning against evil of any kind; exhortation to wariness; advice; injunction. In way of caution I must tell you. Shak. Caution money, money deposited by way of security or guaranty, as by a student at an English university.