onset
US /ˈɑːn.set/
UK /ˈɑːn.set/

1.
开始, 发作
the beginning of something, especially something unpleasant
:
•
The onset of winter brought cold weather.
冬季的开始带来了寒冷的天气。
•
Early onset of the disease makes it harder to treat.
疾病的早期发作使其更难治疗。
开始, 发作
the beginning of something, especially something unpleasant