dead / one who is preoccupied with money, power, etc.

black hairy tongue

(mathematics) quod erat demonstrandum (that which was to be proved)

(Internet slang) a dead fad; out of fashion; no longer trendy

today, this day / nowadays

before the day is done

教訓: lesson, teaching

教訓: to teach

大勲位: the highest order of merit in the Japanese honors system: the 大勲位菊花章 (Dai-kun'i Kikka Shō, “Supreme Order of the Chrysanthemum”)

君辺: vicinity of a lord