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Definition underpin in British English

underpin verb

[transitive] verb
/ˌʌndə(r)ˈpɪn/
1

to be an important basic part of something, allowing it to succeed or continue to exist

Example

the assumptions and beliefs that underpin our whole lives

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2

to support something such as a wall by putting a strong piece of metal or concrete under it

Synonyms and related words
Definition underpin in British English