老ろう大たい国こく

noun

once-powerful nation now in decline; great nation grown old

Refers to a country that was once strong but has aged and lost its former power. Often used in historical or geopolitical commentary.

• かつての老ろう大たい国こくは、今いまでは国こく際さい的てきな影えい響きょう力りょくをほとんど失うしなっている。

  The once-powerful nation has now lost most of its international influence.

• 歴れき史し家かはローマ帝てい国こくを老ろう大たい国こくの典てん型けい例れいとして挙あげる。

  Historians cite the Roman Empire as a classic example of a great nation grown old.