The term "unpowered" refers to objects or systems that are not currently being operated by an external energy source. This could include equipment or machinery that is not running, as well as devices that are normally operated by battery or electrical power that are currently out of power. Synonyms for "unpowered" might include "unplugged," "inactive," "off," "idle," "dead," "stood down," "disconnected," "shut down," or "not energized." These alternative words all imply a state of inactivity or lack of power, and could be useful in a range of contexts, including technical writing, product descriptions, or everyday speech.