夜以继日

夜以繼日

yèyǐ-jìrì

idiom HSK 7-9 #17,715

Meanings

Literally: 'night continues into day' - working through the night into the next day without stopping.

HSK 3

科学家们夜以继日地做实验。

Kēxuéjiā men yèyǐ-jìrì de zuò shíyàn.

The scientists worked on experiments day and night.

HSK 4

为了完成项目，他们夜以继日地加班。

Wèile wánchéng xiàngmù, tāmen yèyǐ-jìrì de jiābān.

To finish the project, they worked overtime around the clock.

usage

Often used with 地 as an adverb before a verb: 夜以继日地工作. Emphasizes tireless effort and dedication.

history

This idiom originates from the Book of Documents (《尚书》), describing King Wu's relentless efforts.

夜 yè

以 yǐ

继 jì

日 rì