person in charge, connection, duty, concern oneself
係 centers on being linked or tied to something: a connection, a duty that binds a person, or the person in charge of that responsibility. The idea of concerning oneself follows naturally from being involved in a connection.
係 combines 亻 (person) with 系 (lineage, connection), suggesting a person who is connected or tied to a role. The exact historical development is uncertain, but the component relationship is well established.
A person 亻 is tied to a thread 系, like someone bound to a duty or connection. Picture a manager holding the end of a string that links them to their team.
For ケイ, imagine a person in charge named Kay who keeps all the connections straight: Kay -> ケイ, and she concerns herself with every link.
relation; relationship; connection
charge; duty; person in charge; official; clerk
to be the work of; to be the result of; to be done by
coefficient
subsection head; assistant manager; chief clerk
person in charge; official; attendant
dispute; contention; conflict; controversy
mooring; anchorage
connection; linking; linkage; link; liaison; contact; coordination
official in charge
connection; relation; association; affiliation
mooring a ship; moored ship
elastic shear modulus
Engel's coefficient; proportion of one's income spent on food
proportion of income spent on one's children; angel coefficient
Gini coefficient
Spearman's rank correlation coefficient
bulk coefficient (viscosity, heat transfer, etc.)
path coefficient
cashier