IPA: /rɪˈlɪdʒənɪst/
KK: /rɪˈlɪdʒənɪst/
A person who is very devoted to their religion, often to an extreme degree.
The religionist spoke passionately about their beliefs during the debate.
Religionist → It is formed from "religion" (from Latin *religio*, meaning to bind or tie) and "-ist" (meaning a person who practices or is concerned with). A religionist is a person who is devoted to or practices a particular religion.
Think of someone who is 'bound' ('religio') to their beliefs — that's what a religionist is, a person devoted to their religion.