全ぜん盛せい時じ代だい

noun

golden age; heyday; prime

Refers to the period when something or someone was at the peak of power, prosperity, or influence.

• ローマ帝てい国こくの全ぜん盛せい時じ代だいは紀き元げん2世せい紀き頃ごろだった。

  The golden age of the Roman Empire was around the 2nd century AD.

• 彼かれは全ぜん盛せい時じ代だいの勢いきおいを失うしなってしまった。

  He has lost the vigor of his prime.