To double again or repeatedly; to increase by continued or repeated additions; to augment greatly; to multiply.

To become greatly or repeatedly increased; to be multiplied; to be greatly augmented; as, the noise redoubles.

A call that essentially doubles the penalties and bonuses of a previous double; a player can only redouble a contract bid by their side which has been doubled by the opposition.

a renewal of attack or riposte in a new line (e.g by disengage or cut-over) the first having been parried (usually an opposition parry) performed at riposting distance, in the lunge or during the recovery

To attack an opponent a second time after the opponent fails to counterattack.