Imprisonment

google

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Middle English emprison, from Old French emprisoner, from em- ‘in’ + prison .

wiktionary

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From Anglo-Norman emprisonement, from Old French emprisonnement. See imprison +‎ -ment.

etymonline

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imprisonment (n.)

late 14c., from Anglo-French emprisonement (13c.), Old French emprisonnement "capture, imprisonment" (13c.), from emprisoner (see imprison).