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Definition of underpin

underpin

/ˌʌndərˈpɪn/
un · der · pin
Past Simple:underpinned
•
Past Participle:underpinned
•
Present Participle:underpinning
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underpin Lexical Profile

underpin Game Scores & Validity

• verb

1

To support, justify, or form the fundamental basis for an idea, theory, argument, or process.

Example

"Rigorous empirical research must underpin any new policy proposals in public health."

2

To support a building, wall, or other physical structure from beneath by laying a solid foundation below ground level or substituting stronger materials.

Example

"Engineers had to underpin the historic church's crumbling stone walls with concrete piers to prevent a collapse."

Synonyms
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Antonyms
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• Rhymes for underpin

• Nearby Words

underperform
underperformance
underperformer
underpin
underpinning
underplay
underpopulated

Word Origin & Etymology

First recorded in the early 16th century as an architectural and masonry term formed from 'under-' and 'pin', originally meaning to support a wall or structure from beneath with props or stone.

Usage Trend

Historical frequency of usage in published text.

180019102020
Data source: Google Books Ngram Viewer

Cite this Entry

Wordmom. (2026). Definition of Underpin. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/underpin
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