四ㄙˋsì胡ㄏㄨˊhú

  1. 樂器名。與二胡略同而有四弦。有大小兩種，大四胡多用於說唱伴奏，小四胡用於獨奏或與民間樂器合奏。

英sihu (or "khuurchir" in Mongolian)​, a bowed instrument with four strings, primarily associated with Mongolian and Chinese culture