'error-prone' originates from the combination of 'error,' which comes from Latin 'error,' meaning 'wandering' or 'mistake,' and 'prone,' from Latin 'pronus,' meaning 'leaning forward.'

'error' changed from the Old French word 'errur' and eventually became the modern English word 'error.' 'Prone' evolved from the Latin 'pronus' through Old French 'prone.'

Initially, 'error' meant 'wandering' or 'deviation,' but over time it evolved into its current meaning of 'mistake.' 'Prone' has largely retained its meaning of 'inclined' or 'susceptible.'