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Jyutping gaam2 cung4
Pinyin jiǎn zhòng

Definitions (Wiktionary)
  1. verb
    to lose weight; to slim down

[-]

Jyutping gaam2 cung5
Pinyin jiǎn zhòng

Definitions (粵典–words.hk)
  1. 動詞
    減輕體​重
    to lose one's weight