頽たい唐とうたいとうMeanings1noundecadence; declineLiterary noun describing a state of moral or cultural decay, decline, or degeneracy. Rare in modern conversation; mostly found in written or formal contexts.その小しょう説せつは、貴き族ぞく社しゃ会かいの頽たい唐とうを描えがいている。The novel depicts the decadence of aristocratic society.