✨📕 The NEWThe NEW Collegiate Dictionary, 12th Edition Over 5,000 words added — Buy Now! Collegiate DictionaryBuy Now!

strengthen

verb

strength·​en ˈstreŋ(k)-thən How to pronounce strengthen (audio)
ˈstren(t)-
strengthened; strengthening
ˈstreŋ(k)th-niŋ
ˈstren(t)th-;
  ˈstreŋ(k)-thə- How to pronounce strengthen (audio)
ˈstren(t)-
Synonyms of strengthennext

transitive verb

: to make stronger, more forceful, more effective, etc.
These exercises will strengthen your abdominal muscles.

intransitive verb

: to become stronger, more forceful, more effective, etc.
The winds are expected to strengthen.
strengthener
ˈstreŋ(k)th-nər
ˈstren(t)th-;
  ˈstreŋ(k)-thə- How to pronounce strengthen (audio)
ˈstren(t)-
noun

Examples of strengthen in a Sentence

These exercises will strengthen your stomach muscles. He takes herbs to strengthen his immune system. The development of new electronic products has strengthened the company's position as the leader in digital technology. Holidays often serve to strengthen bonds between family members. Their financial situation strengthened her determination to find a new career. The team has been strengthened by the addition of several new players. The winds are expected to strengthen. The economy is slowly strengthening. The Canadian dollar is strengthening against the U.S. dollar. The trade restrictions will strengthen the pound.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The curriculum includes a new dedicated module on regenerative agriculture, offering farmers information on rebuilding soil fertility, supporting biodiversity and strengthening long-term farm resilience. Jennifer Bringle, Sourcing Journal, 4 Dec. 2025 The four-year program, agreed at staff level in late November, is designed to bolster macroeconomic stability, restore debt sustainability, and strengthen governance. Amanda Castro, MSNBC Newsweek, 4 Dec. 2025 This cushiony, comforting cream strengthens, softens, and restores, especially for skin that’s dry, compromised, or overworked from retinoids and exfoliants. Deanna Pai, Allure, 4 Dec. 2025 According to Rivero, working with Kansas Care Connect can help practices strengthen patient engagement while keeping their internal resource burden low. Lyssanoel Frater, USA Today, 4 Dec. 2025 See All Example Sentences for strengthen

Word History

First Known Use

15th century, in the meaning defined at transitive sense

Time Traveler
The first known use of strengthen was in the 15th century

Browse Nearby Words

Cite this Entry

“Strengthen.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/strengthen. Accessed 6 Dec. 2025.

Kids Definition

strengthen

verb
strength·​en ˈstreŋ(k)-thən How to pronounce strengthen (audio)
strengthened; strengthening ˈstreŋ(k)th-(ə-)niŋ How to pronounce strengthen (audio)
: to make or become stronger
strengthener noun

More from Merriam-Webster on strengthen

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!