Read Edit View history 乌有 wūyǒu nonexistent Origin Definitions Defs Strokes Stroke Words Sentences Sents Senses Add sense 乌有/ 烏有 wūyǒu nonexistent (literary) to not exist; nonexistent; illusory 他们多年的努力全都化为乌有了。 Edit Delete References Add reference No references for this word.