underpin

verb

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

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

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.
The Bolt’s upgraded batteries, motors and software align the vehicle with GM’s newer EVs like the GMC Hummer, Chevrolet Blazer EV or Cadillac Lyriq underpinned by the automaker’s proprietary Ultium propulsion system. Jackie Charniga, Freep.com, 9 Oct. 2025 Computing costs and energy needs dominate the narrative, yet copper underpins the entire system. IEEE Spectrum, 9 Oct. 2025 Eckert’s ultimate victory in securing regulatory approval for Addyi underpins the documentary’s revelations about gender bias at the FDA as a drug that claimed to improve female pleasure was dismissed as trivial or even dangerous. Etan Vlessing, HollywoodReporter, 9 Oct. 2025 That’s the sort of question underpinning Prime Video’s latest comedy reality series. Jesse Whittock, Deadline, 9 Oct. 2025 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

Browse Nearby Words

Cite this Entry

“Underpin.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/underpin. Accessed 16 Oct. 2025.

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

More from Merriam-Webster on underpin

Last Updated: - Updated example sentences
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