• 右側みぎがわ — right side
• 左側ひだりがわ — left side
• 側面そくめん — side / aspect
• 内側うちがわ — inside surface
• 外側そとがわ — outside surface
• 体側たいそく — side of the body
• 味方側みかたがわ — ally side

The radical 亻 means “person,” and the rest of the character implies direction or placement. Together, it reflects a person’s position or alignment — whether physical (as in one side of something) or relational (such as being on someone’s side).