爛らん熟じゅく期き

noun

peak of maturity; full maturity; zenith

Refers to the stage when something (a person, culture, art, etc.) has reached its fullest development or ripest state. Often used in literary or formal contexts.

• 彼かれの芸げい術じゅつは爛らん熟じゅく期きを迎むかえている。

  His art has reached its peak of maturity.

• 爛らん熟じゅく期きの文ぶん化かは、時ときに退たい廃はいの兆きざしも見みせる。

  A culture at its zenith sometimes shows signs of decadence as well.