ward·er /ˈwɔrdɚ/
  看守,守衛,看門人
  Ward·er n.
  1. One who wards or keeps; a keeper; a guard.  “The warders of the gate.”
  2. A truncheon or staff carried by a king or a commander in chief, and used in signaling his will.
  When, lo! the king suddenly changed his mind,
  Casts down his warder to arrest them there.   --Daniel.
  Wafting his warder thrice about his head,
  He cast it up with his auspicious hand,
  Which was the signal, through the English spread,
  This they should charge.   --Drayton.
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  warder
       n : the chief official in charge of a prison [syn: warden]