← BackshareGuessdiscolourise/dɪsˈkʌləraɪz/verbTo remove color from something, or to become colorless.The chemical can discolourise fabric in just a few minutes.Over time, sunlight will discolourise the ink on old posters.The dentist used a special gel to discolourise the stains on my teeth.SynonymswhitenfadebleachAntonymsdyecolor