Also means
guarantee
Usage Note
Caution is a false friend — it does NOT mean 'caution' (prudence) in French; that is prudence or précaution. A caution is a financial guarantee or security deposit, typically paid when renting an apartment (verser une caution). Confusing it with the English word is one of the most common errors learners make.
Examples
"Il a versé une caution pour l'appartement."
Natural Translation
He paid a deposit for the apartment.

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