V-ERG
(使)變色;(使)褪色
If something discolours or if it is discoloured by something else, its original colour changes, so that it looks unattractive.
例句
A tooth which has been hit hard may discolour...
受過(guò)重?fù)舻难例X可能會(huì)變色。
Some oil had seeped out, discolouring the grass.
有些油滲出來(lái)了，把草地染得變了顏色。