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Jyutping sam1 kuk1
Pinyin xīn qū

Definitions (Wiktionary)
  1. noun, literary
    state of mind
    (syn.) 心緒, 心绪, 思绪, 情懷, 心意, 情绪, 肠, 心神, 心境, 思緒, 情緒, 腸, 心情, 心思, 思, 情怀
  2. noun, literary
    something weighing on one's mind
  3. noun, literary
    innermost being; mind
    (syn.) 私心, 心中, 意下, 肚裡, 心里, 胸, 心裡, 寸心, 心窝, 内心, 肚里, 心田, 心窝子, 心窩子, 肺肝, 心頭, 心上, 肚子, 心內, 心窩, 心头, 心坎, 心地, 心内, 胸中, 心骨, 胸坎, 內心

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Jyutping sam1 kuk1
Pinyin xīn qǔ

Definitions (CC-CANTO)
  1. innermost being