recant
verb [transitive, intransitive] (formal)- recant (something)
to say, often publicly, that you no longer have the same belief or opinion that you had before 公开宣布放弃（原先的信仰、观点等） Word Originmid 16th cent.: from Latin recantare ‘revoke’, from re- (expressing reversal) + cantare ‘sing, chant’.