Once they reach their half life, the brightness starts to fade rapidly.

In lake form, this color is considered to fade rapidly.

Its effect faded rapidly with distance, so it had to be kept close to the subject.

But that moment of fear faded rapidly, as she looked out through her new eyes.

The sound of the other girl's panicked flight faded rapidly.

And her smile faded rapidly, as she considered some problem that I was certainly going to hear about within the next few minutes.

He ran again in 1935 but was unsuccessful, leading to his political career to rapidly fade.

With that he began moving down from the ridge, and rapidly faded into the sea of cloud.

All idea of feeding on the creature faded rapidly from my mind.

The light of day faded rapidly around the turn, slowing them further.