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Use "uncoloured" in a sentence
"It took the rest of the evening, but eventually they added costume to the skinny, mad-haired woman and sagging, balding man on the computer, outfits like the uncoloured, shapeless clothing discarded on the floor."
"All one requires is clear glass or plastic bottles (PET are recommended but any clear, uncoloured bottles will do) and sunlight which most underdeveloped countries have in abundance."
"I covered the cake in this uncoloured icing, see the photo above."