Marshy describes land that is soft, wet, and spongy because it's soaked with water. A marshy area isn't quite solid ground and isn't quite a pond: it's something in between, where your boots might sink into soggy soil with each step, and tall grasses or reeds grow in the waterlogged earth.

You'll find marshy ground near rivers, lakes, or coastlines where water doesn't drain away completely. The Florida Everglades, for example, is a vast marshy region where water moves slowly through grassy wetlands. These soggy places might seem inconvenient for building houses or roads, but they're incredibly important: marshy areas filter water naturally, prevent flooding, and provide homes for countless birds, fish, frogs, and insects.

If you're reading an adventure story set in Louisiana bayou country or the English moors, characters might trudge through marshy terrain, their feet squelching with every step. Walking across marshy ground requires careful attention: what looks like solid earth might actually be a waterlogged patch that soaks your socks in seconds.