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Jyutping sei3 wu4
Pinyin sì hú

Definitions (CC-CEDICT)
  1. sihu (or "khuurchir" in Mongolian), a bowed instrument with four strings, primarily associated with Mongolian and Chinese culture
Definitions (Wiktionary)
  1. noun
    sihu (a bowed string instrument with two pairs of strings used in Chinese folk music)
    (syn.) 四股子