re ‧ doub ‧ le /riːˈdʌb ə l/ BrE AmE verb
redouble your efforts to greatly increase your effort as you try to do something:
Both sides redoubled their efforts to end the war.
re ‧ doub ‧ le /riːˈdʌb ə l/ BrE AmE verb
redouble your efforts to greatly increase your effort as you try to do something:
Both sides redoubled their efforts to end the war.
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012