(historical) the Xi people, an ancient ethnic group in northern China related to the Khitans, originally known as the 库莫奚 kù​mò​xī

(bound form) a general name for musical instruments, especially stringed ones like the 钢琴 gāng​qín, 提琴 tí​qín, or 胡琴 hú​qín; also used for certain keyboard and reed instruments