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discolour

British  
/ dɪsˈkʌlə /

verb

  1. to change or cause to change in colour; fade or stain

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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Example Sentences

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When this occurs, blue-green algae can form blooms that discolour the water, or produce floating mats or scums on the water's surface.

From BBC ● Sep. 9, 2025

When this occurs, the algae can form blooms that discolour the water or produce floating mats or scums on the water’s surface.

From BBC ● Sep. 13, 2024

Do not cook for too long after adding the spinach paste as it will discolour and render the dish unappetising in appearance.

From The Guardian ● Apr. 27, 2016

Frost, wind, rain and drought can discolour and blemish produce but there is no loss of nutrients.

From The Guardian ● Sep. 27, 2012

If the flavour of thyme be agreeable, you may put in a little, but take care that it does not boil in it long enough to discolour the soup.

From The Virginia Housewife by Mary Randolph

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