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Jyutping hei2 zik1
Pinyin qǐ zì

Definitions (Wiktionary)
  1. verb, Min-Nan
    to get damp; to absorb moisture (of dried things)
    (syn.) 返潮, 返漬, 回潮, 返渍
Definitions (Kaifangcidian)
  1. 長霉 – 长霉
  2. 發霉 – 发霉
  3. 有水垢
  4. 有污痕