discolour verb [ I or T ] UK (US discolor) uk/dɪˈskʌl.ər/ us/dɪˈskʌl.ɚ/
(使)褪色,(使)变色to (cause something to) change from the original colour and therefore to look unpleasant
The fire had discoloured the paintwork. 炉火的烘烤使油漆变了颜色。
Related word: discoloration