zestfulEnglishOxford Dictionary of Englishzestful /ˈzɛs(t)f(ʊ)l / ▸ adjective characterized by great enthusiasm and energy: a zestful and exuberant player. – DERIVATIVES zestfully /ˈzɛs(t)fʊli / adverb zestfulness /ˈzɛs(t)f(ʊ)lnəs / noun