smooth over

US /smuːð ˈoʊvər/
UK /smuːð ˈoʊvər/
"smooth over" picture
1.

calmer, minimiser, aplanir

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.
Il a essayé de calmer la dispute entre ses amis.
The manager tried to smooth over the customer's complaints with a discount.
Le gérant a essayé de minimiser les plaintes du client avec une réduction.