go back on - definition and synonyms

phrasal verb [transitive]
present tense
I/you/we/theygo back on
he/she/itgoes back on
present participlegoing back on
past tensewent back on
past participlegone back on
  1. go back on something to fail to do something that you have promised or agreed to do
    go back on your word/promise:

    Both leaders feared that the other would go back on his word.

See also main entry: go