Past tense of fireproof; treated with fire-resistant materials or chemical coatings to prevent or significantly reduce flammability.
From 'fire' and 'proof' (from Old French 'prueve'). Modern term from the 19th century as building codes required fire-resistant construction.
After the devastating Great Chicago Fire of 1871, cities began requiring buildings to be fireproofed—this led to the development of fire-resistant textiles and structural materials that transformed construction!
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