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Jyutping sau3 zeoi2
Pinyin shù zuǐ

Definitions (Wiktionary)
  1. verb, colloquial
    to rinse the mouth; to gargle
    (syn.) 嗀口, 漱嘴, 沐喙, 沖口, 涮嘴巴, 盪嘴, 𠺘喙, 𠺘口, 盪口, 漉喙, 濯喙, 盪嘴巴, 盪口嘴, 咯盪喙, 浪喙, 嘓嘴巴, 盪喙, 刷嘴, 嘓嘴, 過嘴, 洗口, 過口, 𠺘嘴, 涮嘴, 漱口, 涮口