'non-flammability' originates from the prefix 'non-' meaning 'not' and the word 'flammability,' which comes from Latin 'flammare,' meaning 'to set on fire.'

'flammare' transformed into the English word 'flammable,' and with the addition of the prefix 'non-,' it became 'non-flammable,' eventually leading to the noun form 'non-flammability.'

Initially, 'flammare' meant 'to set on fire,' but with the prefix 'non-,' it evolved to mean 'not easily set on fire.'