I. (ˈ)rē+ verb
Etymology: re- + double, v.
transitive verb
1. : to make twice as great in size or amount : renew more vigorously : double , intensify
redoubled attacks
the German radio redoubled its frenzied screaming — S.L.A.Marshall
2.
a. obsolete : to echo back
their moans the vales redoubled — John Milton
b. archaic : to repeat a second time : duplicate
the negative … should be once expressed in a simple sentence; but we generally find it redoubled in old English — John Stoddart
intransitive verb
1. : to become twice as great or greatly intensified
the wails redoubled — Josephine Pinckney
2. archaic : resound
peal upon peal redoubling all around — William Cowper
3. : to double again
the noise doubles and redoubles
the mountain path doubles and redoubles upon itself
4. : to double an opponent's double in bridge
II. noun
1. : an act or instance of redoubling ; specifically : a bridge call permissible only when the last previous call other than a pass was a double by an opponent and having the effect of doubling the scoring values established by the double for tricks and penalties — compare auction bridge , contract bridge
2. : any attack excepting the straight thrust made when a fencing opponent closes the original line of attack but does not riposte