be like talking to a brick wall
US /bi laɪk ˈtɔkɪŋ tu ə brɪk wɔl/
UK /bi laɪk ˈtɔkɪŋ tu ə brɪk wɔl/

1.
parler à un mur, comme parler à un mur
to try to communicate with someone who is unresponsive or unwilling to listen
:
•
Trying to explain the new policy to him was like talking to a brick wall.
Essayer de lui expliquer la nouvelle politique, c'était comme parler à un mur.
•
I tried to convince her, but it was like talking to a brick wall.
J'ai essayé de la convaincre, mais c'était comme parler à un mur.