IPA: /prəˈdʒɛkʃənɪst/
KK: /prəˈdʒɛkʃənɪst/
A person who operates a movie projector or displays films in a theater.
The projectionist carefully adjusted the focus of the film before the show started.
Projectionist → It is formed from "project" (from Latin "proicere", meaning to throw forward) and "-ist" (meaning a person who practices or is concerned with something). A projectionist is a person who operates or manages the projection of films.
Think of someone who 'throws forward' images ('proicere') onto a screen — that's what a projectionist does.