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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Such a test would be a sign of China’s weakening influence over Pyongyang and could spur Seoul to try to acquire nuclear weapons of its own—a position that both South Korea and the United States officially oppose but is gaining traction in Western policy circles. Sungmin Cho, Foreign Affairs, 12 Nov. 2024 With its climate leadership perceived to be weakening, New Zealand may get a cooler reception at COP than in previous years, especially from Pacific Island nations, Cooper said. Mahalia Dobson, NBC News, 10 Nov. 2024 Just two days after Election Day, the Federal Reserve is set to announce its next interest rate decision, the first since officials cut interest rates by half of a percentage point and since unemployment data revealed a weakening labor market. Nicole Goodkind, CNN, 5 Nov. 2024 Many remember the double-digit inflation spikes of the 1970s, fueled by government spending, an oil crisis and a weakening dollar after the collapse of Bretton Woods. Frank Holmes, Forbes, 5 Nov. 2024 See all Example Sentences for weaken 

Word History

First Known Use

circa 1529, in the meaning defined at transitive sense 1

Time Traveler
The first known use of weaken was circa 1529

Dictionary Entries Near weaken

Cite this Entry

“Weaken.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/weaken. Accessed 26 Nov. 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

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!