The act of renouncing or solemnly swearing against something; the process of breaking an oath or promise.
From 'forswear' + '-ing' (gerund/present participle suffix). This creates a noun or participle form showing the ongoing or completed action of forswearing.
The gerund form 'forswearing' appears constantly in religious and legal texts—it's the name for the crucial moment of dramatic moral transformation, like forswearing one's faith or former life.
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