intransitive verb. To fail to function properly.

noun. A failure to function properly.

noun. faulty functioning

noun. failure to function

verb. to function improperly

verb. to fail to function

verb. fail to function or function improperly

noun. a failure to function normally

"The cause of the malfunction is under investigation, she said."

compunction  conjunction  dysfunction  function  injunction  

abnormality  anomaly  breakdown  complication  damage  

malfunctioned  malfunctioning  malfunctions