endorphin
/ɛnˈdɔrfɪn/
noun
- A natural chemical produced by the body that reduces pain and makes you feel happy or calm, especially during exercise or excitement.
- Laughing with friends can trigger the release of endorphins and improve your mood.
- Some people get addicted to the endorphin rush from extreme sports.
- After a long run, her body released endorphins that made her feel relaxed and happy.