under-lock-and-key

Adjective

(not comparable)

(US, UK, idiomatic) imprisoned with little or no chance of escape; locked up.
If it was him we can have him under lock and key in 24 hours.
(US, UK, idiomatic) safely guarded; locked away.

English Wiktionary. Available under CC-BY-SA license.

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"under-lock-and-key." YourDictionary, n.d. Web. 17 April 2019. <https://www.yourdictionary.com/under-lock-and-key>.

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under-lock-and-key. (n.d.). Retrieved April 17th, 2019, from https://www.yourdictionary.com/under-lock-and-key

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