wither|withered|withering

花瓣已经开始凋谢。

The petals are beginning to ___wither.

它曾经很美丽，现在却凋谢了。

It was beautiful, but now it's ___withered.

随着时间推移，他对这项运动的兴趣逐渐减弱了。

His interest in the sport is ___withering over time.