IPA: /ˈdɛkədəntli/
KK: /ˈdɛkəˌdɛntli/
In a way that is luxurious, indulgent, or characterized by excessive pleasure or extravagance.
The party was decadently lavish, with gourmet food and extravagant decorations.
Decadently → It is formed from "decadent" (from Latin "decadentem", meaning falling or declining) and the suffix "-ly" (meaning in a manner of). The word "decadently" describes something done in a manner that is characterized by decline or excessive indulgence.
Think of something that is 'falling' or 'declining' ('decadent') and done 'in a manner' ('-ly') that reflects that excess. This helps you remember that 'decadently' refers to actions marked by indulgence and decline.