trailoff
nounUK /ˈtreɪl ɒf/
US /ˈtreɪl ɔːf/
When your voice gets quieter and quieter until it stops.
She ended her story with a trailoff because she got too shy to finish.
OTHER MEANINGS
2. A gradual decrease in sound or activity until it ends.
The music ended in a slow trailoff.
3. A path or track that leads away from a main route.
We followed a narrow trailoff into the woods.
4. The act of falling behind or lagging at the end of a race or effort.
His trailoff in the final lap cost him the win.