go back on something

Từ điển tiếng Anh - Cambridge Advanced Learners Dictionary

go back on sth phrasal verb [ goes back on sth going back on sth went back on sth gone back on sth gone back on sth ]
to fail to keep a promise, or to change a decision or agreement
• The government looks likely to go back on its decision to close the mines.
• She's gone back on her word and decided not to give me the job after all.
Thesaurus⁺: ↑Making and breaking promises and commitments ↑Changing your mind
Main entry: go_{phrasal verb}