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un·heard·of
 unheard-of
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- pronunciation:
- uhn
huhrd
 v
- features:
- Word Combinations (adjective)
| part of speech: |
adjective |
| definition: |
never before known or considered; completely new.
The unheard-of discovery started a revolution in physics.- antonyms:
- well-known
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| related words: |
absurd, miraculous, obscure |
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