redouble /rɪˈdʌbəl/ (redoubling,redoubled,redoubles)

• 1.  

  V-T/V-I（及物动词/不及物动词） If you redouble your efforts, you try much harder to achieve something. If something redoubles, it increases in volume or intensity. 大大加强; 大量增加

  例：

  The campaign has redoubled its efforts to win the backing of women.

  该活动已经加大努力，以赢取女性选民支持。