"Obsess" is a word in ENGLISH

The advanced works, trenches, or covered roads made by besiegers in their advances toward a fortress or military post.

To besiege.

An engine used in ancient times to beat down the walls of besieged places.

To surround with an army so as to preclude escape; to besiege; to blockade.

A movable tower erected by besiegers for purposes of attack and defense.

To hem in; to waylay; to surround; to besiege; to blockade.

To beset or surround with armed forces, for the purpose of compelling to surrender; to lay siege to; to beleaguer; …

of Besiege

The act of besieging, or the state of being besieged.

One who besieges; -- opposed to the besieged.

That besieges; laying siege to.

of Besiege

A line of field works made around a besieged place and the besieging army, to protect the camp of the …

A trench dug in the bottom of a dry moat, and extending across it, to enable the besieged to defend …

To inclose on all sides; to surround; to encircle; to environ; to invest; to besiege; -- used with about, round, …

A trench guarded with a parapet, constructed by besiegers, to secure themselves and check sallies of the besieged.

A passage cut through the glacis to facilitate sallies by the besieged.

The surrender of a besieged fortress or town ; as, the fall of Sebastopol.

The act of surrounding, blocking up, or besieging by an armed force, or the state of being so surrounded.

To go out; to rush out; to sally forth; as, troops issued from the town, and attacked the besiegers.