peat bog

Từ điển WordNet v3.1 - WordNet Dictionary

noun

wet spongy ground of decomposing vegetation;
has poorer drainage than a swamp;
soil is unfit for cultivation but can be cut and dried and used for fuel
• Syn:
bog
• Derivationally related forms:
boggy (for: bog)
• Hypernyms:
wetland
• Hyponyms:
mire, quagmire, quag, morass, slack, slough