noun
vicious circle; vicious cycle
A self-reinforcing negative situation where one problem causes another, which in turn worsens the first. The antonym is 好循環 (virtuous circle).
Antonyms: 好循環
貧困と病気の悪循環を断ち切る必要がある。
We need to break the vicious circle of poverty and disease.
睡眠不足がストレスを生み、さらに眠れなくなるという悪循環に陥っている。
I'm caught in a vicious cycle where lack of sleep causes stress, which makes it even harder to sleep.