IPA: /ɪɡˈzʌltɪŋli/
KK: /ɪɡˈzʌltɪŋli/
In a way that shows great happiness and joy, often after a victory or success.
The team celebrated exultingly after winning the championship.
Exultingly → It is formed from "exultare" (Latin, meaning to leap up or rejoice) and the suffix "-ly" (meaning in a manner of). The word "exultingly" means in a manner that expresses great joy or triumph.
Think of someone 'leaping up' in joy ('exultare') — that's why they are expressing happiness 'in a manner' ('-ly').