'impracticability' originates from the Latin word 'impracticabilis,' where 'im-' meant 'not' and 'practicabilis' meant 'able to be done or practiced.'

'impracticabilis' transformed into the French word 'impraticable,' and eventually became the modern English word 'impracticable,' with 'impracticability' as its noun form.

Initially, it meant 'not able to be done or practiced,' and this meaning has largely remained the same in modern usage.