underpin

Word parts

under- + pin

Pronunciation

• (UK) IPA ^(key): /ˌʌn.dəˈpɪn/
• (US) (Canada) IPA ^(key): /ˌʌn.dɚˈpɪn/
• (AU) IPA ^(key): /ˌɐn.dəˈpɪn/
• (NZ) IPA ^(key): /ˌɐn.dəˈpən/

• Audio (US)

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• Audio (AU)

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Verb

Plain form underpin

Third-person singular underpins

Past tense underpinned

Past participle underpinned

Present participle underpinning

1. (transitive) If you underpin a structure, you strengthen and stabilize it from below.