"repudiation" in the noun sense
1. repudiation, renunciation
rejecting or disowning or disclaiming as invalid
"Congressional repudiation of the treaty that the President had negotiated"
refusal to acknowledge or pay a debt or honor a contract (especially by public authorities
"the repudiation of the debt by the city"
3. repudiation, debunking
the exposure of falseness or pretensions
"the debunking of religion has been too successful"
Source: WordNet® (An amazing lexical database of English)
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