IPA: //ˌpriːˈdɛstɪneɪtə//
KK: /prɪˈdɛstɪneɪtər/
A person who believes in or teaches the idea that events, especially those related to fate or salvation, are predetermined or fixed in advance.
The predestinator argued that our lives are guided by a divine plan that we cannot change.
Predestinator → It is formed from "prae-" (meaning before) and "destinare" (meaning to determine or establish). The word refers to someone who determines or establishes a fate or destiny beforehand.
Think of someone who 'determines' ('destinare') a fate 'before' ('prae-') it happens — that's what a predestinator does.