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Jyutping sim2 tung3
Pinyin shǎn tòng

Definitions (CC-CEDICT)
  1. stabbing pain
  2. intermittent flash of pain
Definitions (Wiktionary)
  1. noun
    flashes of pain; stabbing pain
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)