Archbishop

google

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Old English, from arch- ‘chief’ + biscop (see bishop), replacing earlier heah-biscop ‘high-bishop’.

wiktionary

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From Middle English erchebischop, archebischop, from Old English ærċebisċop(“archbishop”), from Late Latin or Ecclesiastical Latin archiepiscopus, from Ancient Greek ἀρχιεπίσκοπος(arkhiepískopos), from ἀρχι-(arkhi-, “first, chief”) +‎ ἐπίσκοπος(epískopos, “overseer”), from ἐπισκοπέω(episkopéō, “I watch over”), from ἐπί(epí, “over”) +‎ σκοπέω(skopéō, “I examine”), equivalent to arch- +‎ bishop.

etymonline

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archbishop (n.)

"a bishop of the highest rank," in the West from 9c. especially of metropolitan bishops, Old English ærcebiscop, from Late Latin archiepiscopus, from Greek arkhi- "chief" (see archon) + episkopos "bishop," literally "overseer" (see bishop). Replaced earlier Old English heah biscop. The spelling was conformed to Latin from 12c.