specialty, exclusive, mainly, solely
JLPT2 G6 S9 F506
叀# is a depiction of a heavy, round stone tied to and hanging from a spindle by a cord that rotates → round/rotating object. 專 adds 寸 hand/action indicator → handle a round, rotating object → *exclusive*; *dedicated* (← handle a single object) → *monopolize*.
[Full Kanji Etymology List]