underpin.
To support from below with props or masonry.
Meaning & usage
To support from below with props or masonry.
You should underpin the mine roof to prevent further collapse.
To give support to; to form a basis of; to corroborate.
Public confidence in politicians must underpin our democracy.
Where this word comes from
Etymology tree Proto-Indo-European *h₁én Proto-Indo-European *-tér Proto-Indo-European *h₁entér Proto-Indo-European *h₂én Proto-Indo-European *dʰeh₁-? Proto-Indo-European *-dʰi ? Proto-Indo-European *(H)n̥dʰí Proto-Indo-European *-ér Proto-Indo-European *(H)n̥dʰér Proto-Germanic *under Proto-West Germanic *undar Old English under- Middle English under- English under- Proto-Germanic *pinnaz Proto-West Germanic *pinn Old English pinn Middle English pinne English pin English underpin From under- + pin.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.