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Definitions

strengthen

[strengk-thuhn, streng-, stren-] / ˈstrɛŋk θən, ˈstrɛŋ-, ˈstrɛn- /
VERB
make more forceful, powerful
Synonyms
STRONGEST
bolster build up enhance enlarge establish extend heighten increase intensify invigorate reinforce restore set up step up support sustain toughen
STRONG
add anneal ascend brace buttress confirm corroborate empower fortify harden justify mount multiply regenerate rejuvenate renew rise steel substantiate temper tone wax
WEAK
add fuel to fire make firm sinew tone up
Antonyms
STRONGEST
abridge condense curtail decrease destroy diminish halt hinder lessen let down lower reduce shrink slow subtract undermine weaken
STRONG
contradict decline deny descend disprove drop fall kill reject ruin slump soften
WEAK
break down discourage dishearten dissuade hurt
VERB
encourage, hearten
Synonyms
STRONGEST
consolidate invigorate restore toughen uphold
STRONG
animate back bloom brace burgeon cheer embolden enliven flourish flower fortify gird harden inspirit nerve nourish prepare prosper rally ready refresh rejuvenate steel substantiate temper thrive
WEAK
back up bear out brace up carry weight enhearten gather resources give weight
Antonyms
STRONG
discourage dishearten dissuade fail kill languish let go lose neglect ruin shrink shrivel soften weaken
WEAK
break down hurt

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.

So people don’t hear about the bills she actually did sign — legislation to lower energy costs, strengthen schools, make housing more affordable and attract billions in business investment to the commonwealth.

From Salon • Apr. 15, 2026

She said the amendments "aim to strengthen duty bearers' understanding of the law and how it applies across a range of the scenarios they encounter day-to-day".

From BBC • Apr. 14, 2026

“Partnering with AIP will better enable us to build on our progress, advance our innovation roadmap, and strengthen our competitive position with enhanced flexibility and resources.”

From Barron's • Apr. 14, 2026

Supply tightens globally; American production and financial inflows strengthen in relative terms.

From The Wall Street Journal • Apr. 14, 2026

And they said: ‘Surely that is one of the great steeds of the King of Rohan? Maybe the Rohirrim will come soon to strengthen us.’

From "The Return of the King" by J.R.R. Tolkien

Vocabulary lists containing strengthen

President Obama's second inaugural address

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Spelling Practice, Unit 2

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