插關 [－关]

Jyutping caap3 gwaan1
Pinyin chā guān

Definitions (Wiktionary)
  1. noun, regional
    latch (fastening for a door); door bolt
    (syn.) 關鍵, 门狗, 門閂, 門狗, 门闩, 門栓, 门栓, 門釦, 关键, 门扣