Redouble

[Sarah]

To double again or repeatedly; to increase by continued orrepeated additions; to augment greatly; to multiply.So they Doubly redoubled strokes upon the foe. Shak.n. An optional bid made by the side currently holding the highest bidfor the contract, after the opposing side has doubled. This bidincreases the score for successfully making the contract, andincreases the penalties for failing. The score or penalty depends onthe number of tricks over or under the contract, according to adefined schedule, and depending on the vulnerability of the sideattempting the contract.

[exinilu]

to make something much more than before; to increase something:

[Lanell]

Make or become much greater, more intense, or more numerous.