flunk

"Every person who passes by is a potential customer."

"Responsibility is a heavy burden."

"The teacher was referring to the homework assignment when she said it was due tomorrow. "

"The teacher's explanation had a clear reference to the textbook. "

"My sometimes neighbor, a retired teacher, still visits the school occasionally. "

"The feeling is difficult to describe, but not unpleasant."

"People commonly eat breakfast before going to school. "

"One way to encourage your employees to work harder is by giving them incentives."

"The specific of her success was her dedication to studying. "

"The ballet dancer walked with a graceful attitude."

"He flunked math, again."

"The presentation about the new school rules was very clear and easy to understand. "