let down
US /let daʊn/
UK /let daʊn/

1.
decepcionar, desapontar
to disappoint someone by failing to do what they expect or hope
:
•
I promised to help him, and I don't want to let him down.
Eu prometi ajudá-lo, e não quero decepcioná-lo.
•
She felt completely let down by her friends.
Ela se sentiu completamente decepcionada pelos amigos.
2.
abaixar, soltar
to lower something or allow it to fall
:
•
Can you let down the blinds, please? The sun is too bright.
Você pode abaixar as persianas, por favor? O sol está muito forte.
•
She decided to let down her hair after the formal event.
Ela decidiu soltar o cabelo depois do evento formal.