A swamp is a low, wet area of land that is often flooded and has many trees or plants. The ground is usually muddy and can be difficult to walk through.
Probably from an earlier English word meaning 'spongy ground' related to 'sump' (a pit or hollow). The word has long been tied to wet, soggy land.
Swamps may look messy, but they are powerful natural filters that clean water and protect coasts from floods. When people drain swamps, they often discover too late that they’ve removed a quiet bodyguard.
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