bailiwick

Etymology

From bailie (“bailiff”) and wick (“dwelling”), from Old English wīc.

noun

1. The district within which a bailie or bailiff has jurisdiction.
   The Bailiwick of Jersey.
2. A person's concern or sphere of operations, their area of skill or authority.
   I established the fairly well-understood pattern that affairs of state were not in my bailiwick. 1961, Eleanor Roosevelt, The Autobiography of Eleanor Roosevelt
   Jack is full of these insights, thoughtful turns of phrase from a character whose perpetual struggle between wastrel and righteous is all too familiar a bailiwick for the universal insecurities of the human condition. September 28, 2020, Alex McLevy, “Marilynne Robinson finds transcendence in the stunning, soul-searching Jack”, in The A.V. Club