weaken

verb

weak·​en ˈwē-kən How to pronounce weaken (audio)
weakened; weakening
ˈwēk-niŋ,
ˈwē-kə- How to pronounce weaken (audio)
; weakens

transitive verb

1
: to make weak : lessen the strength of
2
: to reduce in intensity or effectiveness

intransitive verb

: to become weak
weakener
ˈwēk-nər
ˈwē-kə- How to pronounce weaken (audio)
noun
Choose the Right Synonym for weaken

weaken, enfeeble, debilitate, undermine, sap, disable mean to lose or cause to lose strength or vigor.

weaken may imply loss of physical strength, health, soundness, or stability or of quality, intensity, or effective power.

a disease that weakens the body's defenses

enfeeble implies a condition of marked weakness and helplessness.

enfeebled by starvation

debilitate suggests a less marked or more temporary impairment of strength or vitality.

the debilitating effects of surgery

undermine and sap suggest a weakening by something working surreptitiously and insidiously.

a poor diet undermines your health
drugs had sapped his ability to think

disable suggests bringing about impairment or limitation in a physical or mental ability.

disabled by an injury sustained at work

Examples of weaken in a Sentence

The disease weakens the immune system. Some are concerned that the increase in taxes will weaken the economy. The beams had been weakened by water damage. efforts to weaken environmental laws The recent setbacks have not weakened our resolve. These kinds of contradictions weaken your argument. The disease causes the immune system to weaken. The dollar has continued to weaken against the euro. Lower interest rates have weakened the dollar.
Recent Examples on the Web Powell, speaking before the Senate Banking Committee, noted several times the central bank faces risks between slicing rates too soon and reigniting inflation, and waiting too long and weakening the economy and job market. Taylor Wilson, USA TODAY, 10 July 2024 Chances for rain drop on Friday to 40-70% on Friday as the trough weakens and dissipates over Florida. Richard Tribou, Orlando Sentinel, 10 July 2024 The deadly Category 1 hurricane weakened into a tropical storm and was then downgraded to a tropical depression on Tuesday, but the impacts on the state and its logistics operations have lingered. Glenn Taylor, Sourcing Journal, 9 July 2024 Hurricane Beryl made landfall in Texas on Monday as a Category 1 before weakening into a tropic storm. David Faris, Newsweek, 9 July 2024 See all Example Sentences for weaken 

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'weaken.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1530, in the meaning defined at transitive sense 1

Time Traveler
The first known use of weaken was in 1530

Dictionary Entries Near weaken

Cite this Entry

“Weaken.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/weaken. Accessed 15 Jul. 2024.

Kids Definition

weaken

verb
weak·​en ˈwē-kən How to pronounce weaken (audio)
weakened; weakening ˈwēk-(ə-)niŋ How to pronounce weaken (audio)
: to make or become weak or weaker

More from Merriam-Webster on weaken

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