To disconnect a device from an electrical outlet or to remove something that has been plugged in.
From English prefix 'un-' (to reverse) plus 'plug' (to insert into a socket). The word emerged in the early 1900s as electrical devices became common in homes.
The phrase 'unplug and reboot' works because it exploits how computer memory works—cutting all power erases everything stuck in RAM, forcing the system to start fresh, which is why it solves so many tech problems.
Complete word intelligence in one call. Free tier — 50 lookups/day.