Using 'recant' usually means admitting publicly that a previous statement was wrong. The politician had to recant his erroneous remarks on live television.
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Change of Heart
'Recant' is used when someone no longer agrees with what they previously said or believed. The author recanted her previous stance on the issue in her new book.
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Seriousness Implied
The act of recanting is serious and implies a firm and sometimes formal withdrawal. Under pressure, the witness had to recant his testimony.