noun, noun or participle which takes 'suru', intransitive verb
imprisonment; being jailed
Formal or legal term for being put in prison; often used in historical or official contexts. Can be used as a noun or with する to mean 'to be imprisoned'.
彼は窃盗の罪で入牢した。
He was imprisoned for theft.
入牢中に彼は反省
While in prison, he wrote a letter of remorse.