Designed or constructed so that cats cannot enter, escape from, or damage something.
From 'cat' plus 'proof' (from Old French 'preuve' meaning tested or proven); this modern compound became common in the 20th century as pet ownership increased and people needed solutions to cat-related problems.
The existence of 'catproof' is a reminder that language evolves based on practical needs—once cats became common house pets, people invented new words to describe their endless battle against feline mischief!
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