noun
A wetland area that is saturated with water, such as a marsh or swamp
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The researchers conducted a study on the biodiversity of the bog ecosystem.
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Let's go for a walk in the bog and see if we can spot any interesting wildlife.
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I heard there's a creepy old bog out in the woods that people say is haunted.
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Her mind felt like a bog, filled with muddy thoughts that she couldn't seem to navigate through.