D defs.my
Entry 2 senses · 2 variants Webster, 1913

Redouble

/(r?*d?b"'l)/ · Re·dou·ble · IPA /riːdˈʌbəl/
01 v. t. To double again or repeatedly; to increase by continued or repeated additions; to augment greatly; to multiply.
  1. 1.
    To double again or repeatedly; to increase by continued or repeated additions; to augment greatly; to multiply.
    “So they Doubly redoubled strokes upon the foe.” Shak.
02 v. i. To become greatly or repeatedly increased; to be multiplied; to be greatly augmented; as, the noise redoubles.
  1. 1.
    To become greatly or repeatedly increased; to be multiplied; to be greatly augmented; as, the noise redoubles.