to go back on
[phrase form: go]
01
約束を破る, 撤回する
to fail to do as one promised or agreed
例
He promised to help us with the project, but he went back on his word and did n't show up.
彼はプロジェクトを手伝うと約束したが、約束を破り、現れなかった。
The company went back on its pledge to maintain job security for employees.
その会社は従業員の雇用保障を維持するとの誓約を反故にした。
