thick layers of permanently frozen subsoil found in polar regions

ground that is permanently frozen

भूमि जो हमेशा जमी रहती है

English Usage: Archaeologists discovered ancient artifacts buried in the permafrost.

Hindi Usage: पुरातत्वविदों ने पर्माफ्रॉस्ट में दफन प्राचीन धातुएं खोजी।