萬能鑰匙 [万－钥－]

Jyutping maan6 nang4 joek6 si4
Pinyin wàn néng yào shi

Definitions (CC-CEDICT)
  1. master key
  2. skeleton key
  3. passkey
Definitions (Wiktionary)
  1. noun
    master key; skeleton key
    (syn.) 万能锁, 萬能鎖