Meaning of “underpin” in the English Dictionary

"underpin" in British English

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underpinverb [ T ]

uk /ˌʌn.dəˈpɪn/ us /ˌʌn.dɚˈpɪn/ -nn-

formal or specialized architecture to give support, strength, or a basic structure to something:

He presented data to underpin his argument.
Gradually the laws that underpinned (= formed part of the basic structure of) apartheid were abolished.
When restoring the building, the first priority was to underpin the exterior walls by adding wooden supports along the foundations.
underpinning
noun [ C or U ] uk /ˈʌn.dəˌpɪn.ɪŋ/ us /ˈʌn.dɚˌpɪn.ɪŋ/

After a while, we found ourselves questioning the spiritual and philosophical underpinning of the American way of life.

(Definition of “underpin” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"underpin" in Business English

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underpinverb [ T ]

uk /ˌʌndəˈpɪn/ us /-dɚ-/ -nn-

to give support to something or provide the starting point from which something can develop:

Falling unemployment was likely to underpin consumer confidence.
These new products are part of a line-up that will underpin the company's recovery.

(Definition of “underpin” from the Cambridge Business English Dictionary © Cambridge University Press)

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