部下: a subordinate

湯: warm or hot water; tea

武器: weapon, arms / 舞姫: female dancer; dancing girl; danseuse / 葺: (suffix) roofing; roofed with; thatching; thatched with; shingling; shingled with

oral history

historicism

historian

(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

study of history

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

耳鳴り: tinnitus