Ideographic: To look like 肖 rain 雨; 肖 also provides the pronunciationRadical:

meaning for xiāo:

  • - firmament
  • - heavenYunxiao county in Zhangzhou 漳州 , Fujian(the) skiesbeyond the topmost clouds (idiom)
  • - unimaginably far awaythe sky
  • - the heavens
  • - (fig.) imperial courthuge difference