先進国

developed country, advanced nation

s ẽ̞ ɰ̃ ɕ ĩ ŋ k o̞ k ɯ̟
先 priority; being first + 進 advance; progress + 国 country; nation
noun Rare #41,644
developed country, advanced nation A country with a highly developed economy and infrastructure.
JA: 日本は先進国です。
EN: Japan is a developed country.

先進国には…待て

In developed countries... wait.

— タクシー運転手 約束は海を越えて (2017)

先進国は発展途上国を援助しなければならない。

Developed countries must aid developing countries.

先進国は発展途上国をもっと援助すべきだ。

Developed countries should provide more aid to developing countries.