jimmy-proof
Resistant to being jimmied, or circumvented from the outsideResistant to being jimmied, or circumvented from the outside.
Dictionary text adapted from Wiktionary (Wiktionary contributors, CC BY-SA 4.0) and Open English WordNet / Princeton WordNet (CC BY 4.0, WordNet License); shared under CC BY-SA 4.0. Example sentences and recordings are credited where they appear.