The Open Full-Form Lexicon of English
underpin - verb
transitive
| Infinitive | underpin |
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| 3rd person singular | underpins |
| Past | underpinned |
| Past Participle | underpinned |
| Present Participle | underpinning |
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OFFLE The Open Full-Form Lexicon of English |
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underpin - verbtransitive
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