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

1.
mengingkari, menarik kembali
fail to keep a promise or agreement
:
•
He promised to help me, but he went back on his word.
Dia berjanji akan membantuku, tapi dia mengingkari janjinya.
•
You can't just go back on our agreement now.
Kamu tidak bisa begitu saja mengingkari perjanjian kita sekarang.