'inhumanity' originates from Latin, specifically the word 'inhumanitas,' where 'in-' meant 'not' and 'humanitas' meant 'human nature or kindness.'

'inhumanitas' transformed into the Old French word 'inhumanité,' and eventually became the modern English word 'inhumanity' through Middle English.

Initially, it meant 'lack of human feeling or kindness,' and this meaning has largely remained the same in modern usage.