迴形針 [回－针]

Jyutping wui4 jing4 zam1
Pinyin huí xíng zhēn

Definitions (Wiktionary)
  1. noun
    paper clip
    (syn.) 回纹针, 萬字夾, 万字夹, 纸夹, 曲別針, 迴紋針, 紙夾, 曲别针