go back on

US /ɡoʊ bæk ɑːn/
UK /ɡoʊ bæk ɑːn/
"go back on" picture
1.

revenir sur, manquer à

fail to keep a promise or agreement

:
He promised to help me, but he went back on his word.
Il a promis de m'aider, mais il est revenu sur sa parole.
You can't just go back on our agreement now.
Tu ne peux pas simplement revenir sur notre accord maintenant.