To disfigure or deface; to mar, spoil, or damage the appearance or features of something, making it less attractive or distinctive.
From dis- (meaning to reverse or damage) combined with feature (a distinctive characteristic or facial aspect). This creates a verb meaning to destroy or damage distinguishing features.
Shakespeare used 'disfeature' in his plays to describe aging and decay—when time 'disfeatures' someone, it removes the distinctive beauty and charm they once possessed, a poetic way to capture aging's cruelty.
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