挂科

挂科	guà kē	to fail (a course)
挂	guà	to hang; to suspend (from a hook etc) / to hang up (the phone) / (of a line) to be dead / to be worried; to be concerned / (dialect) to make a phone call / to register (at a hospital); to make an appointment (with a doctor) / (slang) to kill; to die; to be finished; to fail (an exam) / classifier for sets or clusters of objects
科	kē	branch of study / administrative section / division / field / branch / stage directions / family (taxonomy) / rules / laws / to mete out (punishment) / to levy (taxes etc) / to fine sb / CL:个