discolour (US discolor)

v 1 [Tn] change or spoil the colour of (sth) 使（某物）变色; 使（某物）退色: Smoking discolours the teeth. 吸烟会使牙齿变色. 2 [I] (of colour) change or be spoilt （指颜色）变化, 变色, 退色.

discard, discern, discernible, discerning, discernment, discharge, discharged, disciple, disciplinarian, disciplinary, discipline, disclaim, disclaimer, disclose, disclosure, disco, disco dancing, disco music, discography, discoloration, discombobulate, discomfit, discomfiture, discomfort, discomfortable, discommode, discompose, discomposure, disconcert, disconcerted, disconcerting, disconcertingly, disconnect, disconnected, disconnectedly, disconnection, disconsolate, disconsolately, discontent, discontented,