B2 履行诺言
to do what you have told someone that you would do
I made a promise to you and I intend to keep it. 我向你作过承诺，我会履行的。
I joined a gym to keep a promise I made to myself to get fitter.
The chancellor insisted that he was keeping his promise not to raise taxes.
He said he would help us and he kept his word.
They have promised new jobs, but so far there's no sign that they're going to keep their word.
See also: keep verb (CONTINUE TO HAVE)