zhěn​gē​dài​dàn

to remain on guard

  1. to rest the head on
    To rest one's head on a pillow or other object; to use as a pillow; (literary) to border or lean against.
  2. dagger-axe
    (bound form) an ancient Chinese weapon consisting of a long handle and a horizontal blade; by extension, weapons in general
  3. to wait
    to wait for; to await
  4. dàn conjunction
    dawn
    dawn; daybreak; morning; (literary) daytime