後鈕 [后钮]

Jyutping hau6 nau2
Pinyin hòu niǔ

Definitions (Wiktionary)
  1. noun, Taiwanese-Hokkien
    hinge (device for the pivoting of a door)
    (syn.) 鉸鏈, 合葉, 合叶, 蝴蝶, 铰链