'faultlessness' originates from the English word 'faultless', where 'fault' meant 'a defect or imperfection' and the suffix '-less' meant 'without'.

'faultless' changed from the Middle English word 'faute' and eventually became the modern English word 'faultless'.

Initially, it meant 'without fault or defect', and this meaning has largely remained the same in modern usage.