نی (Reed) is a type of tall, slender grass that typically grows in wetlands and along riverbanks. It is known for its hollow stems and can reach heights of several meters. Reeds play an important role in their ecosystems, providing habitat for various wildlife and helping to prevent soil erosion. In many cultures, نی is also used to make musical instruments, such as the نی (Ney), a traditional wind instrument in Middle Eastern music. Additionally, reeds are utilized in crafts and construction, as their flexible and durable nature makes them suitable for various applications.