IPA: /ˈhaɪərɑrk/
KK: /ˈhaɪərɑrk/
A person who holds a high position in an organization or system, especially in government or religion, and has authority over others.
The archbishop is a hierarch in the church, overseeing many other clergy members.
Hierarch is formed from "hieros" (meaning sacred) and "archos" (meaning ruler). The term originally referred to a ruler or leader in a sacred or religious context, particularly in relation to church hierarchy.
Think of a 'sacred ruler' — 'hieros' means sacred and 'archos' means ruler, which helps you remember that a hierarch is a leader in a religious or sacred context.