Definition

Verb: * To remove the colour from something; to make something white or colourless.

Usage

This verb describes the action of causing an object to lose its original colour, often through a chemical process or prolonged exposure to a natural agent like sunlight. It is typically used in the passive voice or with an inanimate object as the direct object.

Examples

• The strong chemical will decolourise the fabric if left on too long.
• The vibrant mural was sadly decolourised by years of harsh weather.
• This filter is designed to decolourise the liquid, making it perfectly clear.

Advanced Usage

• Scientific/Technical Context: The term is frequently used in chemistry, textile manufacturing, and water treatment to describe processes that remove pigments or dyes.
  • Activated carbon is used to decolourise the sugar solution during refining.

Variants and Related Words

• Decolorize (verb): The preferred spelling in American English, identical in meaning.
• Decolour (verb): A less common variant.
• Decolorant (noun): A substance that removes colour.
• Bleach (verb): A common synonym, though often implying the use of a specific chemical agent.
• Fade (verb): To lose colour gradually, often due to light or washing, but not necessarily to become completely colourless.

Synonyms

• Bleach
• Whiten
• Blanch
• Wash out

Antonyms

• Colour
• Dye
• Stain
• Tint

Word Forms

• Present participle/Gerund: Decolourising
• Past tense & Past participle: Decolourised
• Third person singular present: Decolourises

Verb

1. remove color from
   • The sun bleached the red shirt