sump ‧ tu ‧ ous /ˈsʌmptʃuəs/ BrE AmE adjective
[ Date: 1400-1500 ; Language: Old French ; Origin: sumptueux , from Latin sumptuosus , from sumptus 'cost' ]
very impressive and expensive:
a sumptuous feast
a sumptuous palace
—sumptuously adverb
—sumptuousness noun [uncountable]