IPA: //ˌsaɪkoʊˈhɪstəriən//
KK: /ˈsaɪkoʊˌhɪstəriən/
A person who studies the psychological motivations behind historical events and trends.
The psychohistorian analyzed the impact of childhood experiences on the decisions of historical leaders.
Psychohistorian → It is formed from "psycho-" (from Greek "psukhē", meaning soul or mind) and "historian" (from Greek "historia", meaning inquiry or knowledge). A psychohistorian is someone who studies the psychological motivations behind historical events.
Think of 'psycho-' relating to the mind and 'historian' as someone who studies history. This helps you remember that a psychohistorian examines the mental aspects of historical events.
No commonly confused words.