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Jyutping si1 kei4 cin2
Pinyin sī qí qián

Definitions (Wiktionary)
  1. noun, Min-Nan
    secret purse; secret stash of money (not known to other members of the family)
    (syn.) 私伽, 體己錢, 私蓄, 私房錢, 私房, 私房鈿, 私奇錢, 私伽錢, 體己, 私己, 私奇, 私胲, 私己錢, 私家