bailiwick
noun
[ ˈbeɪlɪwɪk ]
• one's sphere of operations or area of interest.
• "after the war, the Middle East remained his bailiwick"
• the district or jurisdiction of a bailie or bailiff.
• "the warden had the right to arrest all poachers found within his bailiwick"
Origin:
late Middle English: from bailie + wick2.
