(Aramaic) corresponding to 'ecuwr -- band, imprisonment.
see HEBREW 'ecuwr
H613. esur
אֱסוּר noun [masculine] band, bond (אֵיסוּר אֲסוּר, ᵑ7, Syriac , ); — absolute ׳א Daniel 4:12; 4:20 (of iron and bronze, for stump, in Nebuchadnezzar's vision); plural absolute אֱסוּרִין Ezra 7:26 bonds = imprisonment.