close confinement; strict confinement to barracks
A severe military disciplinary measure in which a soldier is confined to their barracks or quarters, more serious than ordinary 謹慎. Used in historical or military contexts.
He was ordered into close confinement for a disciplinary violation.
During close confinement, all outings are prohibited.
Compound of 重 (heavy, severe) and 謹慎 (confinement, self-restraint). The exact historical derivation is uncertain, but the term is associated with military discipline.