trail off
Upper Intermediate (B2)neutral
slowly get quieter or weaker and then stop
"He started explaining, then his voice trailed off."
Hear it in context
Why You Can’t Sleep (and How to Fix It) | Dr. Michael Grandner
FoundMyFitness · 93:46
Michael: And then and yeah, and then it'll trail off.
The World's Most Extreme Professions | Compilation | The Travel Edit
The Travel Edit · 19:05
You can see our foot our footsteps are starting to trail off.