ebullient
/ɪˈbʌliənt ɪˈbʊliənt इˈबलिअन्ट् इˈबुलिअन्ट्/ adj. ( formal ) full of confidence and energy ऊर्जा एवं उत्साह से पूर्ण, जोशिला
He was so ebullient during the presentation that no one noticed the gaps in his research.