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Meaning of unsell

un•sell

Pronunciation: (un-sel'), [key]
— -sold, -sell•ing.
  1. to dissuade from a belief in the desirability, value, wisdom, or truth of something: He tried to unsell the public on its faith in rearmament.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.