vt.

1. 沾汙，染汙[（+with）]
   Blood stained the blanket.

   血沾汙了毯子。

2. 玷汙，敗壞
   His crimes stained the family honor.

   他的罪行玷汙了家庭的名譽。

3. 給（木材，玻璃等）染色，給……著色
   She stained the table brown.

   她將桌子塗成了棕色。

4. 把（標本等）染色以便於顯微鏡下觀察

vi.

1. 變髒；被沾汙
   His character is without stain.

   他的人品純潔無瑕。

   These carpets won't stain easily.

   這些地毯不易弄髒。

n.

1. 汙點，汙跡，瑕疵[C]
   He's got an ink stain on his shirt.

   他襯衫上有塊墨漬。

2. 色斑[C]
3. 著色劑，染色劑[C][U]

v.

1. mark or discolour with something that is not easily removed.
2. damage (someone's or something's reputation).
3. colour with a penetrative dye or chemical.

n.

1. a stubborn discoloured patch or dirty mark.
2. a thing that damages a reputation.
3. a dye or chemical used to colour materials.
   ▸Biology  a dye used to colour organic tissue so as to make the structure visible for microscopic examination.
4. Heraldry  any of the minor colours used in blazoning and liveries.