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Jyutping jyun5 lak6
Pinyin ruǎn lè

Definitions (Wiktionary)
  1. noun
    costal cartilage
  2. noun, Mainland-China, figuratively, neologism
    weak point; weakness; soft underbelly

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Jyutping jyun5 lak6
Pinyin ruǎn lèi

Definitions (CC-CEDICT)
  1. rib cartilage
  2. (fig.) weak spot
  3. soft underbelly
Definitions (Wiktionary)
  1. noun
    costal cartilage
  2. noun, Mainland-China, figuratively, neologism
    weak point; weakness; soft underbelly
Definitions (兩岸三地生活差異詞語彙編—Two Shores Three Places)
  1. 日常用語:臺
    弱點
  2. 日常用語:陸
    軟肋