noun, noun or participle which takes 'suru'
sudden turn for the worse; sudden deterioration
Describes a situation, condition, or health that abruptly worsens. Often used in news or formal contexts.
患者の容態が急転悪化した。
The patient's condition suddenly took a turn for the worse.
経済情勢が急転悪化
There is a possibility that the economic situation will suddenly deteriorate.