1. To deprive of colour; to bleach.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• dicolor,
• decolor,
• secolour,
• xecolour,
• cecolour,
• fecolour,
• eecolour,
• dwcolour,
• dscolour,
• ddcolour,
• drcolour,
• d4colour,
• d3colour,
• dexolour,
• devolour,
• defolour,
• dedolour,
• decoloure,
• dye colour,
• dyecolour

• decolorize,
• decolor,
• discolour,
• decolourize,
• decolorise,
• decolourise.

The adverb form of "decolour" is "decolourize" or "decolourise" (depending on British or American English spelling).

The adjective form of the word "decolour" is "decolored".

The plural form of the word "decolour" is "decolours".

The singular form of "decolour" is "decolouration".