strength·​en | \ ˈstreŋ(k)-thən How to pronounce strengthen (audio) , ˈstren(t)- \
strengthened; strengthening\ ˈstreŋ(k)th-​niŋ How to pronounce strengthen (audio) , ˈstren(t)th-​ ; ˈstreŋ(k)-​thə-​ , ˈstren(t)-​ \

Definition of strengthen

transitive verb

: to make stronger

intransitive verb

: to become stronger

Other Words from strengthen

strengthener \ ˈstreŋ(k)th-​nər How to pronounce strengthen (audio) , ˈstren(t)th-​ ; ˈstreŋ(k)-​thə-​ , ˈstren(t)-​ \ noun

Synonyms & Antonyms for strengthen



Visit the Thesaurus for More 

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. See More
Recent Examples on the Web Gohh hopes these efforts collectively establish and strengthen bonds between the next generation of theater makers. Los Angeles Times, 16 June 2022 The bank asked more than 260 investors managing about $750 billion in assets whether the economy would strengthen. WSJ, 14 June 2022 Particle is a men’s shampoo line that is scientifically engineered to stimulate hair growth and strengthen the hair from root to tip. Grooming Playbook, The Salt Lake Tribune, 13 June 2022 The hawkish expectations would strengthen if today's U.S. inflation report shows heady price growth in May. Omkar Godbole, Forbes, 10 June 2022 Perform this routine daily or a few times a week to loosen up and strengthen your feet, ankles, and calves. Stephanie Mansour, CNN, 9 June 2022 Purple pigments keep gray hair bright, while silk proteins strengthen against breakage. Harper's Bazaar Staff, Harper's BAZAAR, 8 June 2022 McConaughey urged Congress to not wait any longer, arguing that such a move by lawmakers would promote more responsible gun ownership and, in doing so, strengthen the Second Amendment. Brian Bennett, Time, 7 June 2022 But others think this incident could actually strengthen the community. Kyle Orland, Ars Technica, 7 June 2022 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'strengthen.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of strengthen

15th century, in the meaning defined at transitive sense

Buying Guide

Our Reviews team has selected the best fitness products of the year.

Learn More About strengthen

Time Traveler for strengthen

Time Traveler

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

See more words from the same century

Dictionary Entries Near strengthen

strength deck


strengthening card

See More Nearby Entries 

Statistics for strengthen

Last Updated

19 Jun 2022

Cite this Entry

“Strengthen.” Dictionary, Merriam-Webster, Accessed 27 Jun. 2022.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

More Definitions for strengthen


strength·​en | \ ˈstreŋ-thən How to pronounce strengthen (audio) \
strengthened; strengthening

Kids Definition of strengthen

: to make, grow, or become stronger or more powerful Exercises will strengthen your muscles.

More from Merriam-Webster on strengthen

Nglish: Translation of strengthen for Spanish Speakers

Britannica English: Translation of strengthen for Arabic Speakers


Test Your Vocabulary

Great Words for Scrabble

  • scrabble tiles that read scrabble quiz
  • Which of the following Q-without-U words means the number five in cards or dice?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

Universal Daily Crossword

A daily challenge for crossword fanatics.

Love words? Need even more definitions?

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