When something is no longer functioning, it can be described in various ways depending on the context. For example, if it's a device or machinery that has stopped working, it can be referred to as "broken," "defunct," "out of order," or "malfunctioning." If it's a system or process that has ceased to work properly, it could be described as "inoperative," "inactive," "non-functional," "discontinued," or "obsolete." In a more general sense, if something is no longer serving its intended purpose, it could be characterized as "useless," "ineffective," "futile," or "unproductive." Regardless of the specific term used, it's clear that when something is no longer functioning, it's time for a repair or replacement.