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Definitions

weaken

[wee-kuhn] / ˈwi kən /
VERB
reduce the strength of
Synonyms
STRONGEST
abate decline decrease depress dilute diminish dwindle halt impair lessen lower reduce sap soften undermine wane
STRONG
adulterate crumble cut debase debilitate devitalize droop enervate exhaust fade fail faint flag impoverish invalidate languish limp lose minimize mitigate moderate relapse relax temper thin tire totter tremble vitiate wilt
WEAK
break up ease up give way lose spirit slow down thin out water down
Antonyms
STRONGEST
aid assist compliment develop encourage enlarge expand extend grow help increase praise prolong raise rise strengthen
STRONG
achieve activate aggravate agitate animate clean energize enhance excite free improve incite invigorate purify refresh succeed win
WEAK
build up

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

If shipping through the strait is constrained for another two months, global growth would weaken and only return to its previous trend by the end of 2028, according to UBS.

From The Wall Street Journal • Apr. 13, 2026

“Control over the Strait of Hormuz continues to provide Tehran with significant leverage, and there is little indication it will accept terms that weaken its strategic standing.”

From MarketWatch • Apr. 12, 2026

Even relatively modest fields tend to weaken superconductivity, while stronger ones usually eliminate it entirely once a critical limit is reached.

From Science Daily • Apr. 10, 2026

As these weaken and stiffen over time it can affect walking, talking, eating and breathing.

From BBC • Apr. 10, 2026

It might also weaken my spine or do other permanent damage, so that I might never fly in space again.

From "Flying to the Moon: An Astronaut's Story" by Michael Collins