do (someone) a power of good

idiom

Definition of do (someone) a power of good

British, informal + old-fashioned
: to help someone physically or mentally : to make someone feel better I think spending a day outside in the sunshine would do (you) a power of good.

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“Do (someone) a power of good.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/do%20%28someone%29%20a%20power%20of%20good. Accessed 25 Nov. 2020.

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