go underground

idiom

Definition of go underground

: to start working in secret The political party went underground after the new government took power.

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go under

go underground

go under the knife

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Cite this Entry

“Go underground.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/go%20underground. Accessed 11 Aug. 2022.

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