Learn how to say Redouble correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word redouble:
make or become much greater, more intense, or more numerous: [with object]: we will redouble our efforts to reform agricultural policy [no object]: pressure to solve the problem has redoubled
[no object] Bridge double a bid already doubled by an opponent: by redoubling you are asking your partner to bid something
a call that doubles a bid already doubled by an opponent: this is a textbook position in which to use the SOS redouble
late Middle English: from French redoubler, from re- ‘again’ + doubler ‘to double’. The noun dates from the early 20th century