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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

A Foreign Office spokeswoman also highlighted how the King's visit could help strengthen the relationship and protect its long-term benefits.

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

That stability helped strengthen trust in the local currency, with the percentage of dollar-denominated loans and deposits falling under Velarde, an outcome also driven by central-bank policies discouraging savings in dollars.

From The Wall Street Journal • Apr. 13, 2026

Marriage and childbirth strengthen the swordswoman, who is not a maid like Joan of Arc.

From "The Woman Warrior" by Maxine Hong Kingston

Vocabulary lists containing strengthen

President Obama's second inaugural address

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Spelling Practice, Unit 2

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