ケイ

かか.る、かかり、-がかり、かか.わる

係, 亻, 系, 丿, 糸

person in charge, connection, duty, concern oneself

関係(かんけい): (1) relation; relationship; connection (2) participation; involvement; concern (3) influence; effect (4) sexual relations; sexual relationship (5) related to ...; connected to ...
係(かかり): (1) charge; duty; person in charge; official; clerk (2) connection; linking
係わる(かかわる): (1) to be affected; to be influenced (2) to be concerned with; to have to do with (3) to stick to (opinions)