Bog
/bˈɑɡ/
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Definition
(noun) An area of decayed vegetation (particularly sphagnum moss) which forms a wet spongy ground too soft for walking.
Sentence Examples
The skyscraper is expected to sink into the bog.
It's back there somewhere, through the bog.
CEFR Practice Quiz
The land was a wet ____, making it very hard for us to walk across.