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Jyutping sau2 zi2 gaap3
Pinyin shǒu zhǐ jiǎ

Definitions (Wiktionary)
  1. noun
    fingernail
    (syn.) 指甲蓋蓋, 指甲殼, 指甲兒, 手甲, 手節掐, 指甲篷, 指甲蓋兒, 手指甲, 指甲, 節掐, 指掐棚子, 指甲篷子, 指甲子, 手掌甲, 指掐, 掌甲, 節掐子, 手指掐, 手爪

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Jyutping sau2 zi2 gaap3
Pinyin shǒu zhǐ jia

Definitions (CC-CANTO)
  1. finger nails
Examples (粵典–words.hk)
  1. Cantonese
    阿松啲手指甲 绲晒黑边。
    阿松啲手指甲 緄晒黑邊。
    aa3 cung4 di1 sau2 zi2 gaap3 kwan2 saai3 haak1 bin1.
    • The ends of A-chung's nails are black. (i.e. his nails are probably very dirty)
  2. Cantonese
    手指甲
    手指甲
    sau2 zi2 gaap3
    • fingernail
Examples (Wiktionary)
  1. Cantonese
    听人讲手指甲凹凹凸凸系表示健康有问题。
    听人讲手指甲凹凹凸凸系表示健康有问题。
    teng1 jan4 gong2 sau2 zi2 gaap3 nap1 nap1 dat6 dat6 hai6 biu2 si6 gin6 hong1 jau5 man6 tai4.
    • I hear that uneven fingernails indicate there are some health issues.