muts.tsav denotes a defensive work used in the besieging and confinement of a city.

The attested use denotes a defensive emplacement in a siege setting: Isaiah 29:3 places it among actions of camping against, confining, and raising fortresses.

1. Defensive work in a siege · dominant

   In Isaiah 29:3, the masculine singular absolute noun occurs in the statement that the city will be encamped against and confined; the APB renders the clause, “I will confine you with an entrenchment,” before mentioning raised fortresses.

   Isaiah 29:3

In the Anselm Project Bible: In Isaiah 29:3 the APB presents the term within the clause “I will confine you with an entrenchment.” This identifies the clause's overall presentation rather than isolating each English word as a direct rendering.