1. to remove color from something; to make colorless or pale
Usage: British spelling; American spelling is 'decolorize'; transitive verb

Examples

• The strong sunlight will decolorise the fabric over time.
• Chlorine can decolorise many organic dyes.
• The old photograph had decolorised to a pale sepia tone.
• Chemical treatments decolorise the wood before staining.
• Prolonged exposure to UV rays decolorises the paint on the car.
• The bleach decolorised the red dye completely.