IPA: /ˈpɪkpruːf/
KK: /ˈpɪkˌpruf/
This term describes something that is made to stop unauthorized access or tampering, especially in the context of locks or security devices.
The new pickproof lock ensures that no one can break in without the proper key.
Pickproof → It is formed from "pick" (from Old English "piccan", meaning to pierce or stab) and "proof" (from Old French "proef", meaning resistant or able to withstand). The word "pickproof" means resistant to being pierced or stabbed, indicating a level of security against such actions.
Think of something that is 'resistant' ('proof') to being 'pierced' ('pick') — that's why pickproof means it can't be easily pierced.