The story
- Late Latin · derived fromdioecēsis
- Medieval Latin · derived fromarchdiocesis
- English todayarchdiocese
Ultimately from Medieval Latin archdiocesis, variant of archidioecēsis, from archi- (“chief, main”) + Late Latin dioecēsis, q.v., equivalent to arch- + diocese.
Etymology from Wiktionary, CC BY-SA 4.0.