bond·man /ˈbɑn(d)mən/
  奴隸
  Bond·man n.; pl. Bondmen
  1. A man slave, or one bound to service without wages. “To enfranchise bondmen.”
  2. Old Eng. Law A villain, or tenant in villenage.
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  bondman
       n 1: a male bound to serve without wages [syn: bondsman]
       2: a male slave [syn: bondsman]