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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

McKechnie - who once said he treats "broken-down athletes who are almost like reclamation projects" - had discovered Hargreaves' knee issues were caused by pelvic instability and therefore got him working to strengthen his core.

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

“While we expect manufacturing and infrastructure investment demand to strengthen on the back of resilient exports and continued support from policy financing tools, credit demand still remains weak,” they say.

From The Wall Street Journal • Apr. 14, 2026

Something had to be done to strengthen the Soviet position.

From "Fallout: Spies, Superbombs, and the Ultimate Cold War Showdown" by Steve Sheinkin

Vocabulary lists containing strengthen

President Obama's second inaugural address

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Spelling Practice, Unit 2

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