unthankful
adj. 忘恩负义的;不知感谢的;使人不愉快的
例句
For men shall be lovers of their own selves, covetous, boasters, proud, blasphemers, disobedient to parents, unthankful, unholy.
因为那时人要专顾自己,贪爱钱财,自夸,狂傲,谤讟,违背父母,忘恩负义,心不圣洁。