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が激しい

is very intense; is severe

→ が
phrase Uncommon #11,547
is very intense; is severe Describes something such as an amount, degree, or force as very strong.
JA: この通りは交通量が激しい。
EN: This street has very heavy traffic.

この通りは交通量が激しい。

This street has heavy traffic.

天気の変が激しい。

The weather changes dramatically.

疲労が激しいわ

I’m utterly exhausted.

— きっと、うまくいく (2009)