as.sir denotes a person held captive, whether facing death, confinement, or release from detention.

The attested use denotes a person under captivity or confinement: those who may fall among captives, are gathered and shut up, are brought out from detention, or groan while facing death.

1. A person held in captivity or confinement · dominant

   All four occurrences use the masculine singular absolute noun for a person under restraint. In Isaiah 10:4 the APB renders the clause "bow down among the prisoners"; in Isaiah 24:22 it describes people gathered and shut up, while Isaiah 42:7 speaks of bringing such a person out from the dungeon and Psalm 79:11 of that person's groaning before God.

   Isaiah 10:4Isaiah 24:22Isaiah 42:7Psalm 79:11

In the Anselm Project Bible: The APB presents the term with "prisoners" in Isaiah 10:4 and Isaiah 24:22 and with "a prisoner" in Isaiah 42:7 and Psalm 79:11. These renderings confirm the verses' captivity setting rather than establish separate lexical senses.