'seldom-demanded' originates from the combination of 'seldom' and 'demanded', where 'seldom' means 'not often' and 'demanded' means 'requested or required'.

'seldom' comes from Old English 'seldan', and 'demanded' comes from Old French 'demander', which eventually became the modern English word 'demand'.

Initially, 'seldom' meant 'rarely', and 'demanded' meant 'asked for', and this meaning has largely remained the same in modern usage.