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discolouring is discolour's Present Participle

discolour

US 
UK 
  • v.变色;褪色;使变色;使褪色
Simple Present:discolours  Present Participle:discolouring  Past Participle:discoloured  
v.
1.
使变色;使褪色;污染,弄脏
2.
变色;褪色,脱色
3.
污染,变脏