noun

permafrost

permafrost

Climate change is thawing the permafrost.

Climate change is thawing the permafrost.

They built the house on permafrost.

They built the house on permafrost.

((permafrost)) a thick subsurface layer of soil that remains frozen throughout the year. Climate change is thawing the permafrost.

Synonyms: tundra, frozen ground

A blend of 'permanent' and 'frost'. It means permanently frozen ground.

Break it down into 'perma' (permanent) and 'frost'. It's frost that's always there.

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