flunk
/flʌŋk/verb [vi. 不及物动词] 失败;放弃;考试不及格
I am going to flunk that exam. 那次考试我不及格。
verb [vt. 及物动词] 使…不及格
Your son is upset because he flunked a history exam. 你儿子很沮丧是因为他没通过历史考试。
noun [抽象名词] 不及格;失败
I fail/flunk the exam, because I didn't study. 因为我没学习所以考试不及格。