IPA: /ˈɑːrkˌfiːnd/
KK: /ˈɑːrkˌfiːnd/
A main evil spirit or demon, often considered the most powerful among them.
In many stories, the archfiend is the ultimate antagonist that heroes must defeat.
Archfiend → It is formed from "arch-" (from Greek "archon", meaning chief or principal) and "fiend" (from Old English "feond", meaning enemy or demon). The word "archfiend" refers to a chief enemy or principal demon.
Think of 'arch-' meaning chief and 'fiend' meaning enemy — an archfiend is the chief enemy or principal demon.
No commonly confused words.