trail off
US /treɪl ɔf/
UK /treɪl ɔf/

1.
spegnersi, affievolirsi
If a speaker or their voice trails off, they stop speaking or the sound of their voice becomes weaker and weaker and then stops.
:
•
His voice trailed off as he realized his mistake.
La sua voce si spense mentre realizzava il suo errore.
•
The conversation trailed off into silence.
La conversazione si spense nel silenzio.