smooth over
US /smuːð ˈoʊvər/
UK /smuːð ˈoʊvər/

1.
suavizar, amenizar
to make a problem or difficulty seem less serious or important than it really is
:
•
He tried to smooth over the argument between his friends.
Ele tentou suavizar a discussão entre seus amigos.
•
The manager tried to smooth over the customer's complaints with a discount.
O gerente tentou suavizar as reclamações do cliente com um desconto.