'sumptuously-adorned' originates from the Latin word 'sumptuosus,' meaning 'costly' or 'lavish,' combined with 'adorned,' from the Latin 'adornare,' meaning 'to decorate.'

'sumptuosus' transformed into the Old French word 'sumptueux,' and eventually became the modern English word 'sumptuous.' 'Adornare' transformed into the Old French 'adourner,' and eventually became the modern English word 'adorn.'

Initially, 'sumptuous' meant 'costly' or 'lavish,' and 'adorn' meant 'to decorate.' The combined form 'sumptuously-adorned' retains these meanings, emphasizing rich decoration.