sōu​cháng​guā​dù

to rack one's brains

  1. to search
    To search for; to look for; to examine or frisk (as for contraband); to collect or gather (information, talent, etc.)
  2. feelings
    (bound form) refers to one's inner feelings, thoughts, or intentions
  3. to scrape
    To scrape with a blade or tool to remove a surface layer or smooth an object; to shave; to wipe or brush against.
  4. mind
    the inner heart or mind