弱くなった

became weaker

→ 弱い
phrase Rare #24,934
became weaker Describes something that has become less strong, intense, or valuable, depending on context.
JA: 雨が弱くなった。
EN: The rain became lighter.

欧州通貨はドルに対して弱くなった。

European currencies weakened against the dollar.

運動不足で筋肉が弱くなった。

My muscles have weakened from lack of exercise.

彼の呼吸は次第に弱くなった。

His breathing gradually grew weaker.