'opulently' originates from Latin, specifically the word 'opulentus,' where 'op-' meant 'wealth' and '-ulentus' meant 'full of.' 'Furnished' comes from Old French 'furnir,' meaning 'to supply or provide.'

'Opulentus' transformed into the French word 'opulent,' and eventually became the modern English word 'opulent.' 'Furnir' evolved into the English word 'furnish' through Middle English.

Initially, 'opulent' meant 'full of wealth,' but over time it evolved into its current meaning of 'richly decorated.' 'Furnish' originally meant 'to supply,' and this meaning has largely remained the same in modern usage.