Definition
- C2
To be so worried about something that it causes one to have difficulty sleeping.
擔心、焦慮
She's been losing sleep over the upcoming exam.
她一直因為即將到來的考試而失眠。
I don't think you should lose sleep over such a small matter.
我覺得你不應該為這樣的小事失眠。
He was losing sleep about the company's financial situation.
他因為公司的財務狀況而失眠。