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Jyutping sei2 jyut6
Pinyin sǐ xué

Definitions (CC-CEDICT)
  1. lethal point (acupuncture)
  2. vulnerable spot
  3. Achilles' heel
Definitions (粵典–words.hk)
  1. 名詞
    致命​弱點​(​量​詞​:​個​)
    primary weakness; Achilles' heel
    • 議員嘅質詢正中佢嘅死穴。
      议员嘅质询正中佢嘅死穴。
      ji5 jyun4 ge3 zat1 seon1 zing3 zung3 keoi5 ge3 sei2 jyut6.
      The questioning from the member of the parliament points out his primary weakness.
  2. 近義詞
    弱點、罩門
  3. 反義詞
    強項
Definitions (Wiktionary)
  1. noun
    weak spot (which can cause death when struck); fatal weakness
Examples (粵典–words.hk)
  1. Cantonese
    育儿其中一个死穴就系将自己童年缺失嘅嘢过量咁投放喺自己小朋友身上。
    育兒其中一個死穴就係將自己童年缺失嘅嘢過量咁投放喺自己小朋友身上。
    • One of the Achille's Heels of parenting is to excessively put what the parents lack in their childhood back to their children.
  2. Cantonese
    议员嘅质询正中佢嘅死穴。
    議員嘅質詢正中佢嘅死穴。
    ji5 jyun4 ge3 zat1 seon1 zing3 zung3 keoi5 ge3 sei2 jyut6.
    • The questioning from the member of the parliament points out his primary weakness.