redoubled

From the verb redouble: (⇒ conjugate)

redoubled is: ⓘ

v past

v past p

WordReference Random House Learner's Dictionary of American English © 2026

re•dou•ble /riˈdʌbəl/  v. [~ + object] , -bled, -bling. 

1. to increase greatly or by twice as much:
   They redoubled their efforts to finish on time.

WordReference Random House Unabridged Dictionary of American English © 2026

re•dou•ble  (rē dub′əl), v., -bled, -bling, n. 
v.t. 

1. to double;
   make twice as great:
   to redouble one's efforts.
2. to echo or reecho.
3. Games [Bridge.] to double the double of (an opponent).
4. to go back over:
   to redouble one's footsteps.
5. [Archaic.] to repeat.

v.i. 

6. to be doubled;
   become twice as great.
7. to be echoed;
   resound.
8. Games [Bridge.] to double the double of an opponent.

n. 

9. Games [Bridge.] the act of doubling one's opponent's double.
10. Sport [Fencing.] an attack in a line other than that of the previous attack, made after the failure of the opponent to follow his or her parry of the previous attack with a riposte.

• Middle French redoubler. See re-, double
• 1470–80

re•dou′bler, n. 

Collins Concise English Dictionary © HarperCollins Publishers::

redouble / rɪˈdʌb^əl/ verb

1. to make or become much greater in intensity, number, etc: to redouble one's efforts
2. to send back (sounds) or (of sounds) to be sent back; echo or re-echo
3. to double (an opponent's double)

noun

1. the act of redoubling