夜以继日 Traditional 夜以繼日 yè yǐ jì rì 🔊 night and day (idiom) HSK 7–9 + Keep this word Meanings yè yǐ jì rì 夜以繼日 night and day (idiom); continuous strenuous effort Its characters 夜yènightHSK 4以yǐto useHSK 5继jìto continueHSK 7–9日rìday (of the month)HSK 1