late 14c., from Anglo-French emprisonement (13c.), Old French emprisonnement "capture, imprisonment" (13c.), from emprisoner (see imprison).
Entries linking to imprisonment
imprison v.
c. 1300, from Old French emprisoner "imprison; be in prison" (12c.), from assimilated form of in- "in" (from PIE root *en "in") + prison (see prison). Formerly also emprison. Related: Imprisoned; imprisoning.