The story
- Latin · derived fromexsequiās
- Old French · derived fromexequies
- Middle English · inherited fromexequies
- English todayexequy
A back-formation from exequies, from Middle English exequies, from Old French exequies, from Latin exsequiās, accusative of exsequiae (“a funeral, seeing-off procession”).
Etymology from Wiktionary, CC BY-SA 4.0.