discolour
/dɪsˈkʌlə(r)/( <美> discolor)
verb
no obj.
1- become a different, less attractive colour变色; 褪色：
do not over-knead the dough while adding the fruit or it will discolour.
加入水果时不要过分搓揉面团, 否则面团会变色。
1.1
- with obj. change or spoil the colour of使变色; 损坏…的色彩：
too much aluminium can discolour water
过多的铝会使水变色
as adj. discoloured her beauty was marred by discoloured teeth.变色的牙齿有损她的美丽。
派生词
discoloration
（亦作discolouration）noun词源
late Middle English: from Old French descolorer or medieval Latin discolorare, from des-， dis- (expressing reversal)+Latin colorare 'to colour'.