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CEFR B2 Vocabulary - Lesson 34
Here you will learn some English words about certainty and doubt, such as "ensure", "forecast", "assure", etc. prepared for B2 learners.
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to go back on a promise
[phrase]
to fail to keep or fulfill a commitment or assurance made to someone
to go back on one's word
[phrase]
to fail to keep a promise or commitment that was previously made
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