backwater
A place or group seen as old-fashioned and left behind.
Backwater describes a place that's isolated, stuck in the past, or cut off from progress and new ideas. A backwater town might lack modern amenities, new businesses, or cultural opportunities that bigger cities enjoy. When someone calls a place a backwater, they usually mean it feels forgotten or left behind while the rest of the world moves forward.
The word comes from an actual backwater: a part of a river where water sits still instead of flowing with the current. Just like still water in a quiet inlet, a backwater place seems disconnected from the main flow of activity and change.
People sometimes use backwater too harshly, though. A small town might seem like a backwater to someone from a big city, but that same town might treasure its quiet pace and close community. What looks like isolation to one person might feel like peaceful independence to another.
The word can also describe a person or organization stuck in old ways of thinking. If a school uses teaching methods from fifty years ago and refuses to consider anything new, someone might call it a backwater institution. The term suggests not just being old-fashioned, but being stubbornly resistant to improvement or innovation.