lockexpert
nounUK /ˈlɒkˌɛkspɜːt/
US /ˈlɑːkˌɛkspɜːrt/
A person who is very good at opening and fixing locks.
The lockexpert opened the door when we lost our key.
OTHER MEANINGS
2. A person who knows a lot about keeping things safe and secure.
The lockexpert helped us choose a strong lock for our bike.
3. A tool or machine that helps open locks.
This little lockexpert can open any padlock.
4. A person who is very skilled at solving tricky puzzles about locks.
She is a lockexpert at the puzzle club.