ジ, ズ, こと, つか.う, つか.える, ろ
matter, thing, fact, business, reason, possibly
JLPT4 G3 S8 F18
The relevant oracle bone form of this character is 又 hand/action indicator + an upright tube for holding slender, inscribed bamboo slats → an official raising a slender tube containing bamboo slats inscribed with records → *matter*; *affair*; *thing* (← matters recorded) → *job*; *work*; *serve*; *attend to* (← carry out official duties). Originally the same character as 史, but 事 and 史 came to bear divergent meanings (compare the same process in 句 and 局).
[Full Kanji Etymology List]