underpin

verb

un·​der·​pin ˌən-dər-ˈpin How to pronounce underpin (audio)
underpinned; underpinning; underpins
Synonyms of underpinnext

transitive verb

1
: support, substantiate
underpin a thesis with evidence
2
: to form part of, strengthen, or replace the foundation of
underpin a structure
underpin a sagging building

Synonyms of underpin

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Examples of underpin in a Sentence

a wall underpinned by metal beams the central beliefs that underpin a free society
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.
Security will underpin the AI economy, but trust will define it. — Zak Doffman, Forbes.com, 31 July 2026 That same pivot underpins a wider incubator-style model, from the BFC Mini MBA and business resilience programs to experiments in unlocking subsidized studio space via the patron network. — Tianwei Zhang, Footwear News, 29 July 2026 Open-source software underpins internet infrastructure and is incorporated into much of the world’s modern technology, including products offered by major tech companies such as Microsoft. — Renee Dudley, ProPublica, 29 July 2026 Its power comes from the base material underpinning the menu – masa, lovingly made by owner and chef Emmanuel Galvan. — John Metcalfe, Mercury News, 28 July 2026 See All Example Sentences for underpin

Word History

First Known Use

1522, in the meaning defined at sense 1

Time Traveler
The first known use of underpin was in 1522

Rhymes for underpin

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Browse Nearby Words

underpick
underpin
underpinner
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Cite this Entry

“Underpin.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/underpin. Accessed 5 Aug. 2026.

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Kids Definition

underpin

verb
un·​der·​pin -ˈpin How to pronounce underpin (audio)
1
: to give support to
underpin an argument with evidence
2
: to form part of, strengthen, or replace the foundation of
underpin a structure

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Nglish: Translation of underpin for Spanish Speakers

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