Past tense: made burglar-proof; retrofitted a building with burglary protection.
From burglarproof + -ed (past tense suffix). Created as businesses and homeowners began systematically hardening buildings against theft.
When a building was 'burglarproofed' in the 1900s, it meant iron bars on windows and reinforced doors—today it means cameras, alarms, and smart locks.
Complete word intelligence in one call. Free tier — 50 lookups/day.