盛んな

thriving

→ 盛んだ

phrase Rare #42,301

thriving Used before a noun to describe something that is active, flourishing, or popular, such as a sport, industry, or trade.

JA: この地域は農業が盛んなことで知られています。

EN: This region is known for its thriving agriculture.

The Italian cities where commerce and industry flourished provided citizens with venues for free political gatherings.

— イル・ポスティーノ (1994)

It was the most popular sport in this country.