IPA: /ˌɑːrkɪˈpɪspəpəl/
KK: /ˌɑrkiˈpɪspəˌpəl/
Relating to an archbishop or the office of an archbishop.
The archiepiscopal authority was evident in the decisions made during the council.
Archiepiscopal → It is formed from "archi-" (from Greek "archi-", meaning chief or principal) and "episcopus" (from Latin, meaning bishop) and the suffix "-al" (meaning pertaining to). The word "archiepiscopal" refers to matters pertaining to an archbishop, who is a chief bishop.
Think of 'chief' ('archi-') and 'bishop' ('episcopus') to remember that 'archiepiscopal' relates to the chief bishop.