verb
wilt
WILT/wɪlt/
To become limp or lose strength.
The dry plant wilts over the pot's rim.
Etymology
Wilt probably comes from welken, meaning “to wither.” The early sense described plants fading and drooping, the same loss of firmness expressed when heat, dryness, or weakness makes something limp.
In context
With its pollen distributed in just a single day, the flower's job is done. As the sun sets, the petals wilt and die.