Dictionary.com
Thesaurus.com
Synonyms

strengthen

American  
[strengk-thuhn, streng-, stren-] / ˈstrɛŋk θən, ˈstrɛŋ-, ˈstrɛn- /

verb (used with object)

  1. to make stronger; give strength to.

    Synonyms:
    support, fortify, reinforce, buttress
  2. Phonetics. to change (a speech sound) to an articulation requiring more effort, as from fricative to stop or nongeminate to geminate.


verb (used without object)

  1. to gain strength; grow stronger.

strengthen British  
/ ˈstrɛŋθən /

verb

  1. to make or become stronger

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

  • overstrengthen verb
  • prestrengthen verb (used with object)
  • restrengthen verb
  • strengthener noun
  • strengtheningly adverb
  • unstrengthened adjective
  • unstrengthening adjective

Etymology

Origin of strengthen

First recorded in 1250–1300, strengthen is from the Middle English word strengthnen. See strength, -en 1

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.

"In addition, we've struck a deal on medicine pricing that puts patients first and strengthens our life sciences sector, all without taking essential funding from our frontline services."

From BBC

The draft law does not legislate for a ban on Senedd politicians lying more generally, after a committee recommended that the existing regime of investigations by a parliamentary standards commissioner be strengthened instead.

From BBC

Paramount Skydance will try to get several representatives elected to the WBD board at the annual meeting as shareholders to strengthen its position.

From Barron's

“Ultimately, by accepting membership in the Returning Member category, Brooks is making the decision to return to the PGA Tour now—something our fans want, and something that strengthens both the game and our organization.”

From The Wall Street Journal

The euro strengthened significantly against the dollar in 2025, and further gains would lower prices of imported goods and services, including energy.

From The Wall Street Journal