暗鎖 [－锁]

Jyutping am3 so2
Pinyin àn suǒ

Definitions (CC-CEDICT)
  1. built-in lock
Definitions (Wiktionary)
  1. noun
    built-in lock
Definitions (Kaifangcidian)
  1. （沒有對應漢語詞彙）