'unanswerable' originates from Middle English, specifically the prefix 'un-' meaning 'not' and the word 'answerable,' where 'answer' meant 'to respond.'

'unanswerable' changed from the Middle English word 'unanswereable' and eventually became the modern English word 'unanswerable'.

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