endorphin
‘pain suppressant released by the brain’
Lexical development traced from the Tamil root:
F. endorphine < endogène ‘endogenous, growing within’ < Gk. endon ‘in, within’ < en-do- + genus < uhn < en < Tamil il-iṉ
endorphin
English words derived from Tamil il-iṉ connoting 'attaining'