halfheartedEnglishOxford New American Dictionaryhalfhearted /ˌhafˈhärdəd, ˌhæfˈhɑrdəd / ▸ adjective without enthusiasm or energy: after two years of halfhearted effort, he dropped out of school. – DERIVATIVES halfheartedness /ˌhafˈhärdədnəs, ˌhæfˈhɑrdədnəs / noun