tail off
US /teɪl ɔf/
UK /teɪl ɔf/

1.
diminuir, desaparecer, reduzir
to become smaller or weaker, or to happen less often
:
•
Sales tend to tail off in the summer months.
As vendas tendem a diminuir nos meses de verão.
•
The applause began to tail off as the speaker finished.
Os aplausos começaram a diminuir quando o orador terminou.