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imprisonment (without forced labour); incarceration; confinement
被告は禁錮三年の判決を受けた。
The defendant received a sentence of three years' imprisonment.
禁錮刑は懲役刑より軽いとされる。
Imprisonment is considered lighter than penal servitude.
禁錮中に反省の日々を送った。
He spent his days in prison reflecting.