The story
- Latin · derived frominvocatio, invocationem
- Old French · derived frominvocacion
- Middle English · inherited frominvocacioun
- English todayinvocation
From Middle English invocacioun, from Old French invocacion, from Latin invocatio, invocationem. Equivalent to invoke + -ation.
Etymology from Wiktionary, CC BY-SA 4.0.