I can't tell you

idiom

Definition of I can't tell you

informal
used to emphasize a statementI can't tell you how pleased we are that you could join us.

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“I can't tell you.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/I%20can%27t%20tell%20you. Accessed 7 Aug. 2020.

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