一宿 yìxiǔyísù all night Origin Definitions Defs Strokes Stroke Words Sentences Sents yìxiǔ all night 一 yī numeral one one; the number 1; single; alone宿 xiǔ [night] (classifier) A measure word used for nights; also refers to a night in a general sense.yísù to stay overnight 一 yī numeral one one; the number 1; single; alone宿 sù verbnoun to stay overnight to stay overnight; to lodge; to spend the night