permafrost
noun/ˈpɜrməfrɔst/
Frequency rank: #15,894 of 20,003 in the WORDED list (wordfreq data)
Meaning
a layer of soil or rock that remains frozen throughout the year, found mainly in polar regions.
Example sentence
Scientists are concerned that warming temperatures will cause the permafrost to melt and release trapped greenhouse gases.
Synonyms & related words
More words in ranks 15,801–15,900
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