redouble
Concise Oxford English Dictionary © 2008 Oxford University Press:
redouble/riːˈdʌbl/
▶verb
- 1 make or become much greater or more intense or numerous.
- 2 Bridge double a bid already doubled by an opponent.
– origin ME: from Fr. redoubler, from re- ‘again’ + doubler ‘to double’.
'redouble' also found in these Oxford entries:

