IPA: /ˈkætəˌkɪst/
KK: /ˈkætəˌkɪst/
A person who teaches religious principles and prepares individuals for membership in a Christian church.
The catechist led the class in discussions about the faith and its practices.
Catechist → It is formed from "catechize" (from Greek "katēkhizō", meaning to instruct orally) and the suffix "-ist" (meaning one who practices or is concerned with). A catechist is someone who instructs others, particularly in religious matters, through oral teaching.
Think of someone who 'instructs orally' ('catechize') — that's what a catechist does.