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Permafrost

UK //ˈpɜːməfrɒst// US //ˈpɜːrməfrɔːst// Pronunciation

Definition

Ground that remains completely frozen for two or more consecutive years.

Listen to definition

In simple words: Ground that is permanently frozen.

Examples

• The construction crew had to drill through solid permafrost to lay the foundation.
• Permafrost plays a crucial role in regulating the Earth's climate.
• Scientists study permafrost to understand climate change impacts.
• In some regions, permafrost is melting due to rising temperatures.
• Vegetation grows on the surface of permafrost during the short summer.

Usage notes

Used primarily in scientific and environmental contexts. Avoid in casual conversations unless discussing climate change or geography.

Grammar pattern

standalone noun

Memory hint

Think of 'permanent frost' that never goes away.

Collocations

• melting permafrost
• arctic permafrost
• thawing permafrost

Synonyms

• perennial ice
• permafrost layer
• frozen ground

Common mistakes

• Confused with 'frost' which is temporary freezing.
• Spelling errors, often forgetting 'perma'.