expression, godan verb (-su)
fail to earn a credit; fail a course
Used in academic contexts when a student does not receive credit for a course, typically due to poor performance or insufficient attendance. The second English gloss 'fail to make the grade' is a more general equivalent.
必修科目の単位を落とすと、卒業が危なくなる。
If you fail a required course, graduation becomes at risk.
彼は
He ended up failing his math course.