redouble

verb

re·​dou·​ble (ˌ)rē-ˈdə-bəl 

redoubled; redoubling; redoubles

transitive verb

1

: to make twice as great in size or amount

broadly : intensify, strengthen

2

a

obsolete : to echo back

b

archaic : repeat

intransitive verb

1

: to become redoubled

2

archaic : resound

3

: to double an opponent's double in bridge

redouble noun

Synonyms of redouble

• intensify
• enhance
• deepen
• heighten
• strengthen

Examples of redouble in a Sentence

They redoubled their efforts to finish the work on time.

Their efforts to finish the work redoubled as the deadline drew near.

Recent Examples on the Web

But while workers at the Cameron plant are now redoubling efforts to eke out a few thousand more tons with the existing system, there’s been no decision to expand the plant, my Total tour guides told me. —Tim McDonnell, semafor.com, 31 Mar. 2026

As the war in the Middle East and the surge in crude prices provide a windfall to the Kremlin, Kyiv has redoubled its efforts to hobble Russia’s energy production. —Tim Lister, CNN Money, 28 Mar. 2026

So, investigators redoubled their efforts to try to learn more. —Peter Van Sant, CBS News, 22 Mar. 2026

As well as his tour, Orban urged supporters to redouble efforts to flood the digital campaign space. —Arkansas Online, 17 Mar. 2026

Word History

First Known Use

15th century, in the meaning defined at transitive sense 1

Rhymes for redouble

• bubble
• double
• rubble
• stubble
• trouble

Kids Definition

redouble

verb

re·​dou·​ble (ˈ)rē-ˈdəb-əl 

: to make or become doubled (as in size or amount)

redoubled their efforts