The process or treatment of making something resistant to damage from frost and freezing temperatures.
Gerund form of 'frostproof,' combining 'frost' and the verbal form of 'proof.' The -ing suffix indicates the ongoing action or process of creating frost resistance.
Historical buildings used frostproofing techniques centuries before modern chemistry—they'd fire bricks at specific temperatures or add sand mixtures to mortar to make them survive harsh winters.
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