undergird

verb

un·​der·​gird ˌən-dər-ˈgərd How to pronounce undergird (audio)
undergirded; undergirding; undergirds
Synonyms of undergirdnext

transitive verb

1
archaic : to make secure underneath
… took measures to undergird the ship …Acts 27:17 (Revised Standard Version)
2
: to form the basis or foundation of : strengthen, support
Facts and statistics subtly undergird his commentary …Susan Q. Stranahan

Did you know?

When undergird was a new word in the 16th century, it was ships that were undergirded—that is, made secure below—and the undergirding was done by passing a rope or chain underneath. That literal sense has long since fallen out of use, but in the 19th century undergird picked up the figurative “strengthen” or “support” meaning that we still use. Centuries before anything was undergirded, however, people and things could be girded—that is, encircled or bound with a flexible band, such as a belt. Girding today is more often about preparing oneself to fight or to do something difficult, as in “girding themselves for an ideological battle.” About as old as gird is the word’s close relation, girdle, which originally referred to an article of clothing that circles the body usually at the waist; the girdles of today address the same anatomical territory but with the squeezy aim of making the waist look thinner. Gird also gives us girder, a noun referring to a horizontal piece supporting a structure.

Examples of undergird in a Sentence

the theory of evolution undergirds virtually all of modern biology
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.
This includes the inherently exploitative nature of apparel production that is undergirded by unequal power dynamics between the global North and the global South. Jasmin Malik Chua, Sourcing Journal, 15 Dec. 2025 So age has been something that's always been undergirding. Dana Taylor, USA Today, 10 Dec. 2025 Mamdani sailed to victory in the New York City mayor’s race, first in the primary, then in the general election, on a platform of affordability undergirded by good old-fashioned class warfare. Abby Phillip, Time, 4 Dec. 2025 Some might say the new Aurora Regional Navigation Campus that opened recently in a former 255-room hotel is undergirded by one of humanity’s seven deadly sins — envy. John Aguilar, Denver Post, 28 Nov. 2025 See All Example Sentences for undergird

Word History

First Known Use

1526, in the meaning defined at sense 1

Time Traveler
The first known use of undergird was in 1526

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Cite this Entry

“Undergird.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/undergird. Accessed 20 Dec. 2025.

Kids Definition

undergird

verb
un·​der·​gird ˌən-dər-ˈgərd How to pronounce undergird (audio)
: to make secure : brace up : strengthen
a life undergirded by religion
Last Updated: - Updated example sentences
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