The act of removing something by washing, or washing that undoes or reverses a previous cleaning.
From dis- (reversal/removal) + washing (from Old English wascan, meaning to clean with water). This could mean either washing away or undoing a wash.
This rare word hints at the chemistry of laundering—sometimes washing can set stains permanently, so 'diswashing' might describe an unsuccessful attempt to reverse that damage. It's a word that could have been useful in textile manufacturing.
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