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

1.
appianare, smussare
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.
Ha cercato di appianare la discussione tra i suoi amici.
•
The manager tried to smooth over the customer's complaints with a discount.
Il manager ha cercato di appianare i reclami del cliente con uno sconto.