IPA: /ˈræp.tʃər.əs.li/
KK: /ˈræp.tʃər.əs.li/
In a way that shows great joy or delight.
She rapturously accepted the award, overwhelmed with happiness.
Rapturously → It is formed from "rapture" (from Latin *raptura*, meaning a carrying off or seizure) and the suffix "-ously" (meaning in a manner characterized by). The word "rapturously" means in a manner characterized by intense joy or ecstasy, as if one is carried away by emotion.
Think of being 'carried away' ('raptura') by overwhelming joy — that's why rapturously means expressing great delight.