unconvicted prisoner; prisoner awaiting trial
Legal term for a person detained while their trial is pending; contrasts with 既決囚 (convicted prisoner).
See also: 既決囚
Unconvicted prisoners are held in a detention center until their trial concludes.
Compound of 未決 (pending decision) + 囚 (prisoner). The exact historical derivation is uncertain, but the term is a straightforward legal compound.