夜不归宿 Traditional 夜不歸宿 yè bù guī sù 🔊 to stay out all night (idiom) + Keep this word Meanings yè bù guī sù 夜不歸宿 to stay out all night (idiom) Its characters 夜yènightHSK 4不bùnot; noHSK 1归guīto returnHSK 6宿sùlodge for the night