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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.

That will further strengthen its influence in the Middle East.

From BBC • Apr. 8, 2026

Bringing digital-asset activity into a well-defined regulatory perimeter would strengthen oversight, improve compliance with anti-money-laundering standards and reduce user incentives to rely on opaque—and often vulnerable—offshore markets.

From The Wall Street Journal • Apr. 8, 2026

The ministry "calls for building upon this positive step by launching serious and sustainable dialogue tracks that address the root causes of the disputes and strengthen mutual trust," it said on X.

From Barron's • Apr. 8, 2026

“As we lean into those priorities, we need to operate with greater focus, speed, and alignment to strengthen our differentiated capabilities,” said Ahuja in a statement.

From Los Angeles Times • Apr. 7, 2026

To be loved, baby, hard, at once, and forever, to strengthen you against the loveless world.

From "The Fire Next Time" by James Baldwin