'incomprehensible' originates from Latin, specifically the word 'incomprehensibilis,' where 'in-' meant 'not' and 'comprehensibilis' meant 'able to be understood.'

'incomprehensibilis' transformed into the Old French word 'incomprehensible,' and eventually became the modern English word 'incomprehensible.'

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