en‧dor‧phin /enˈdɔːfɪn $ -ˈdɔːr-/
noun [countable usually plural][
Date: 1900-2000;
Origin: endo- ( ⇒ endocrine) + morphine]
a chemical produced by your body that reduces pain and can make you feel happier
[TahlilGaran] Dictionary of Contemporary English ▲