DICT.TW Dictionary Taiwan

 gate·keep·er /-ˌkipɚ/
 看門人

 gatekeeper
      n 1: someone who controls access to something; "there are too
           many gatekepers between the field officers and the
           chief"
      2: someone who guards an entrance [syn: doorkeeper, doorman,
          door guard, hall porter, porter, ostiary]