a prisoner: someone held in confinement, whether locked in a jail or a pit or carried off and kept by a conquering power
This word names a person, not a place and not a process. It comes from the ordinary verb for tying something up (אָסַר), and it keeps that picture: a human being who has been bound or shut away and is not free to walk out.
Hebrew does not sort such people into the categories English expects. The same word covers:
- the inmates of the Egyptian jail where Joseph was put
- a whole conquered population carried off and refused permission to go home
- the dead in Job's poem, at last beyond the shouting of the slave driver
Nothing in the word itself says the person did anything wrong. It reports only that someone else is holding them.
In the Psalms and the prophets the word turns up again and again in one setting: someone is groaning, and God is listening. The prisoner is the person God hears, the person God promises to bring up out of the pit, the person a cruel king will not let go home. That gives the word a forward tilt toward release that the flat English "prisoner" does not have.
Zechariah pushes the picture furthest with his "prisoners of hope," people still shut in a dry pit who are told to come back to the stronghold. Whether that means captives who now have grounds for hope or people held fast by hope itself, the basic sense holds: they are being held, and getting them out is the point.