early 15c., from sleep (n.) + -less. Old English had sl?pleas but the modern word seems to be a re-formation. Similar formation in German schlaflos, Dutch slapeloos. Related: Sleeplessly; sleeplessness.
雙語例句
1. A sleepless baby can seem to bring little reward.
寶寶睡不著覺似乎沒有任何好處。
來自柯林斯例句
2. I have sleepless nights worrying about her.
我好幾個晚上都睡不著，一直擔心她。
來自柯林斯例句
3. I've had a few sleepless nights recently.
最近我有好幾個晚上沒睡覺。
來自《權威詞典》
4. His identification with the hero of the book made him sleepless.
對書中主人公的同情使他睡不著.
來自《簡明英漢詞典》
5. The boy's misconduct cost his mother many sleepless nights.