View synonyms for strengthen


[ strengk-thuhn, streng-, stren- ]

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.


/ ˈstrɛŋθən /


  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

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Derived Forms

  • ˈstrengthener, noun
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Other Words From

  • strengthen·er noun
  • strengthen·ing·ly adverb
  • over·strengthen verb
  • pre·strengthen verb (used with object)
  • re·strengthen verb
  • un·strengthened adjective
  • un·strengthen·ing adjective
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Word History and Origins

Origin of strengthen1

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

The company told us the reason for the change is “to maintain our standards of privacy and strengthen our protections around user data.”

In order to maintain our standards of privacy and strengthen our protections around user data, we have made changes to our Search Terms Report to only include terms that a significant number of users searched for.

That might have induced a type of physical interaction known as a Fujiwhara effect, in which a strong storm might strengthen further as it absorbs the energy of a lesser storm.

Unfortunately, Congressional Republicans have resisted attempts to provide additional needed funds to the states to help strengthen the mail-in voting process.

From Fortune

By early Tuesday, Laura is expected to enter the Gulf of Mexico, where conditions could allow the storm to “strengthen significantly” into a proper hurricane, according to the Weather Channel.

From Fortune

This distrust in the government can ultimately strengthen Boko Haram.

“Liberia is still working very hard to strengthen their health-care system,” says McDaniel.

Fans of the drink believe that it can boost qi, improve circulation, cure arthritis, and strengthen the body in general.

They have long since been touted as medicinal fungi, boasting the ability to strengthen the immune system and lower cholesterol.

We are all they have, and if we give up hope, we will only strengthen the monsters that did this.

But it was necessary to take Silan, which the rebels hastened to strengthen, closely followed up by the Spaniards.

The general commanded a halt, and ordered the men to refresh and strengthen themselves by food and drink.

Strengthen yourselves, stay not: for I bring evil from the north, and great destruction.

Such a course will immensely strengthen the hands of the Queen's Government.

To strengthen the bonds so loosely yet so finely drawn must henceforth be the constant duty of the Statesmen of the Empire.