They — Violence and strife. Go about — Do encompass it, as it were a garrison. Walls — In the outward parts, as also in the very midst of it. So that all parts were horribly corrupted.
Related Commentaries of Psalms 55:10
Psalms 55:10
10 Day and night they go about it upon the walls thereof: mischief also and sorrow are in the midst of it.