/ɪnˈgrætɪtju:d; US -tu:d ||; ɪnˈgrætəˌtud/noun [U] (
formal 正式) the state of not showing or feeling thanks for sth that has been done for you; not being grateful 没有感谢的心意或表示；忘恩负义
☞A less formal word is ungratefulness. 不大正式的场合用ungratefulness。 [OPP] gratitude 反义词为gratitude