positive thinking

historic, historical / already-happened, past / former, old, traditional

historian

study of history

(Internet slang, especially anime and manga fandom) events or things from the past which one wants to whitewash/erase from history (due to it being embarrassing, poorly received, etc.); dark past

oral history

historicism

Shenzhen (a major sub-provincial city in Guangdong, in southeastern China)

a female given name

beneficent / merciful