the.com/prisoner
A person whose entire schedule is decided by someone holding a key.
means Someone confined against their will, usually by the state or a captor, and stripped of the freedom to leave.
from From Old French prisonier, rooted in Latin prensio, a seizing or taking — the original perp, freshly grabbed.
Famous prisonerSocrates drank hemlock rather than escape his cell.
POW rulesGeneva Conventions forbid forcing them to fight.
Game theoryThe Prisoner's Dilemma never involves actual prisons.