IPA: /ˈblɪs.fəli/
KK: /ˈblɪs.fəl.i/
In a way that shows great happiness or joy.
She blissfully enjoyed her vacation by the beach.
Blissfully → It is formed from "bliss" (from Old English *blīðs*, meaning joy or happiness) and "-fully" (meaning in a manner full of). The word "blissfully" means in a manner full of joy or happiness.
Think of feeling 'full of joy' — 'bliss' means joy, and '-fully' indicates the manner of being. This helps you remember that 'blissfully' describes a state of being very happy.