com·mis·sion·aire /kəˌmɪʃəˈnær, ˈnɛr/
  門警;看門者
  Com·mis·sion·aire n.
  1. One intrusted with a commission, now only a small commission, as an errand; esp., an attendant or subordinate employee in a public office, hotel, or the like.
  Note: The commissionaire familiar to European travelers performs miscellaneous services as a light porter, messenger, solicitor for hotels, etc.
  2.  One of a corps of pensioned soldiers, as in London, employed as doorkeepers, messengers, etc.
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  commissionaire
       n : a uniformed doorman