flunked
v.
( flunk的过去式和过去分词 );
（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;
例句:
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I flunked math in second grade.
我二年级时数学不及格。
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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。
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He flunked out ( of college ) last year.
他去年 ( 从大学 ) 退学了.
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The boy stopped attending, and Berman flunked him.
来自NEWYORKER
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ETFs, in my book, have completely flunked the test.
来自WSJ
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When he flunked his exams again, he was caned by his father and moved back to Saigon for a stricter regimen.
来自NEWYORKER