Noah Webster
Redouble
REDOUBLE, verb transitive redub'l. [re and double.]
1. To repeat in return.
2. To repeat often; as, to redouble blows.
3. To increase by repeated or continued additions.
And AEtna rages with redoubl'd heat.
REDOUBLE, verb intransitive redub'l. To become twice as much.
The argument redoubles upon us.