flunks
v. <美><口>( flunk的第三人称单数 ); (使)(考试、某学科的成绩等)不及格; 评定(某人)不及格; (因不及格而) 退学
If you flunk an exam or a course, you fail to reach the required standard.
Your son is upset because he flunked a history exam.
你儿子心烦意乱是因为没有通过历史考试。
He got two flunks on his report.
他的报告上有两门不及格.