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general::
Phrase(s): Take my word for it.
Believe me.; Trust me, I am telling you the truth. • Bill: Take my word for it. These are the best power tools you can buy. Bob: But I don’t need any power tools. • Rachel: No one can cook better than Fred. Take my word for it. Bill: Really? Fred: Oh, yes. It’s true.
McGrawhill's American Idioms And Phrasal Verbs