The story
- Latinindūrō
- Latinindūrāre
- Old Frenchendurer
- Middle Englishenduren
- English todayendure
From Middle English enduren, from Old French endurer, from Latin indūrō (“to make hard”). Displaced Old English drēogan, which survives dialectally as dree. Doublet of dure.
Etymology from Wiktionary, CC BY-SA 4.0.