IPA: /hɪˈstɔːrɪən/
KK: /hɪˈstɔrɪən/
A person who studies, writes about, or teaches history.
The historian published a new book about ancient civilizations.
Historian → It is formed from "historia" (from Greek "ἱστορία", meaning inquiry or knowledge acquired by investigation) and the suffix "-an" (meaning relating to or belonging to). The word "historian" refers to someone who is related to or specializes in the inquiry and study of history.
Think of someone who investigates and gathers knowledge about the past — that's what a historian does, as they are related to the study of history.