Sumptuous

Etymology

From Latin "sumptuosus" ("costly, expensive"), from "sumptus" ("expense, cost"), the past participle of "sumere" ("to take up, spend, consume"). The link to great expense is why the word implies costly indulgence. The related "sumptuary laws" once tried to limit exactly such lavish spending.

adjective · /SUMP-choo-us/
Splendidly rich, costly, and luxurious, especially in ways that appeal to the senses.
What it names
The word for luxury you can feel and taste — a sumptuous feast, sumptuous fabrics — richness experienced rather than merely seen.
Example
They sat down to a sumptuous banquet of roast meats, fruit, and wine.
Related idea
Opulent emphasizes visible wealth; sumptuous emphasizes rich, costly indulgence of the senses.