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Meaning of unround

un•round

Pronunciation: (un-round'), [key]
— v.t. Phonet.
  1. to articulate (an ordinarily rounded vowel) without rounding the lips; delabialize. Cf. (def. 57c),(def. 14).
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.