fade : 侧重指渐渐失去色彩和光泽。
- If you hang your clothes out in the bright sun, they will fade.
- My suntan is already fading.
- They arrived home just as the light was fading (= as it was getting dark).
- The sun had faded the blue walls.
wither : 指因无活力而丧失生命力。
- Grass had withered in the fields.
- This country is in danger of allowing its industrial base to wither away.