bēng​gōng​zi

door spring

bēng​gōng​zi door spring

  1. door-closing device
    A device, often made of wire, installed on a door to make it close automatically and prevent it from slamming.
  2. zi affix
    noun suffix
    [suffix] used to form nouns from noun, verb, or adjective roots

bēng​gōng​zi slingshot

  1. to spring
    To spring or bounce back; to snap or fly off due to high tension.
  2. bow and arrow
    a weapon used for shooting arrows or pellets, consisting of a curved frame and a string