IPA: //sʌmpˈtʃuəsli//
KK: /sʌmpˈtʃuəsli/
In a way that is luxurious, rich, or extravagant, often relating to food, decor, or lifestyle.
The banquet was sumptuously decorated with golden tableware and exquisite flowers.
Sumptuously → It is formed from 'sumptus' (from Latin, meaning expenditure or expense) and the adverbial suffix '-ly' (meaning in a manner of). The word 'sumptuously' means in a manner that involves great expense or luxury.
Think of 'sumptus' which relates to spending or expense, and remember that 'sumptuously' describes something done in a luxurious or lavish way.