go back on
US /ɡoʊ bæk ɑːn/
UK /ɡoʊ bæk ɑːn/

1.
يتراجع عن, ينكث بـ
fail to keep a promise or agreement
:
•
He promised to help me, but he went back on his word.
لقد وعد بمساعدتي، لكنه تراجع عن كلمته.
•
You can't just go back on our agreement now.
لا يمكنك ببساطة التراجع عن اتفاقنا الآن.