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Jyutping si3 seoi2 wan1
Pinyin shì shuǐ wēn

Definitions (Wiktionary)
  1. verb, Cantonese, verb-object
    to test the waters

試水溫 [试-温]

Jyutping
Pinyin shì shuǐ wēn

Definitions (CC-CEDICT)
  1. to test the waters