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Jyutping gwat1 zi2 leoi5
Pinyin gǔ zi lǐ

Definitions (CC-CEDICT)
  1. beneath the surface
  2. fundamentally
  3. at the deepest level
Definitions (Wiktionary)
  1. adv
    deep down; at heart
Examples (Tatoeba—Mandarin-English)
  1. Mandarin
    冰冷的疾风吹到我骨子里去了。
    冰冷的疾風吹到我骨子裡去了。
    bīng lěng de jí fēng chuī dào wǒ gǔ zi lǐ qù le 。
    • An icy blast of wind cut me to the bone.
    • The icy blast of wind pierced me to the marrow.