主
シュ, ス, シュウ, ぬし, おも, あるじ, かず, ず, もん

lord, chief, master, main thing, principal

JLPT4 G3 S5 F95

丶# lamplight + a massive lamp stand → lamp stand giving off light (compare 灯). Conceptually, 主 represents a stationary object, leading to the meanings *master*, *owner* and *leader* (← person who remains in a certain place) → *main*; *principal* (← main person ← master; owner; leader). Also, *god* (← master).

[Full Kanji Etymology List]