Caution is a noun and verb meaning:
* Noun: Care taken to avoid danger or harm.
* Verb: To warn someone about a possible danger or problem.
For example:
* Noun: "He exercised caution when crossing the busy street."
* Verb: "The police cautioned the driver about speeding."
If you were looking for a different word, please provide more context or the word you were actually trying to find.