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English definition of “go back on sth”

go back on sth

phrasal verb with go     /ɡəʊ/ verb [I] (present participle going, past tense went, past participle gone)
to not do something that you promised you would do: I never go back on my word (= not do what I said I would do).Making and breaking promises and commitments
(Definition of go back on sth from the Cambridge Learner's Dictionary © Cambridge University Press)

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