FROM STRONG’S HEBREW DICTIONARY (1890)

Strong’s Hebrew Dictionary (1890) — public domain, printed whole.

matsowr maw-tsore' — or matsuwr {maw-tsoor'}; from 6696; something hemming in, i.e. (objectively) a mound (of besiegers), (abstractly) a siege, (figuratively) distress; or (subjectively) a fastness:--besieged, bulwark, defence, fenced, fortress, siege, strong (hold), tower.

see HEBREW for 06696