Wiktionary
decolourize
alt. (context transitive intransitive English) To drain of colour, to remove the colour from. vb. (context transitive intransitive English) To drain of colour, to remove the colour from.
WordNet
decolourize
v. remove color from; "The sun bleached the red shirt" [syn: bleach, bleach out, decolor, decolour, decolorize, decolorise, decolourise, discolorize, discolourise, discolorise]