必ひっ衰すい

noun

inevitable decline; certain decay

Archaic term for the idea that decline or collapse is unavoidable. Rarely used in modern Japanese outside of historical or literary contexts.

• 「盛じょう者しゃ必ひっ衰すい」ということわざの一いち部ぶとして「必ひっ衰すい」が使つかわれる。

  The word 必衰 is used as part of the proverb 盛者必衰 (jōsha hissui), meaning 'the prosperous must decline.'