Question

At first he was very angry, but his friends managed to cool him off.

Accepted Answer

(transitivehttps://en.wiktionary.org/wiki/Appendix:Glossary#transitive) To causehttps://en.wiktionary.org/wiki/cause to decrease in temperature, activity or temper.

Sentence	At first he was very angry, but his friends managed to cool him off.
Definition	( transitive https://en.wiktionary.org/wiki/Appendix:Glossary#transitive ) To cause https://en.wiktionary.org/wiki/cause to decrease in temperature, activity or temper.

Angry Friends Managed Cool Decrease Temperature Activity Temper