KanjiJLPT N3
Side

side, lean, oppose, regret

Mnemonic

Butler Alfred lives by one golden rule: never occupy the center of any room. He always stands to the side, poised and ready. A proper butler knows his place is at the side—close enough to serve, invisible enough to vanish.
Additional thoughts
Picture Alfred pressed against the wall of a grand hall, perfectly aligned to one side. The rule is what binds him there—duty keeps him lateral, never central.
Quick recall
Butler Alfred's rule: always stay to the side, never the center.

Details

The keyword for 側 is side. This kanji refers to the area beside or next to something, indicating a lateral position relative to a person, object, or concept. It can denote a physical side, such as the left or right side of a road, or a more abstract sense, such as one's perspective or standpoint in a situation. It conveys the idea of being adjacent to or in proximity to something rather than at its center.
On'yomi
そく
Kun'yomi
かわ、がわ、そば