miǎn​kāi​zūn​kǒu

keep your mouth shut

  1. to be prohibited
    Used in signs or formal contexts to indicate something is not allowed or should not be done
  2. 开 開 kāi verbparticle
    to open
    to open; to unfold; to unseal; (of flowers) to bloom; to carve or cut open
  3. [honorific]
    an honorific used when referring to people or things related to the person being addressed
  4. mouth
    mouth of a person or animal; (bound form) oral