arm is a polysemous word in English with multiple meanings:
1. The upper limb of the human body from the shoulder to the hand
2. A weapon, especially a firearm (often plural: arms)
3. A branch or division of an organization (e.g., the sales arm)
4. In technology: ARM refers to Advanced RISC Machines, a processor architecture
5. A sleeve of a garment
6. To equip or supply with weapons