chiv·al·rous
 /ˈʃıvəlrəs/  adj   [more ~; most ~]
  1 : behaving in an honorable or polite way especially toward women
   a kind and chivalrous man
  2 : showing respect and politeness especially toward women
   chivalrous behavior
   a chivalrous act
  chiv·al·rous·ly  adv  
   He acted chivalrously.