永久冻土 Traditional 永久凍土 yǒng jiǔ dòng tǔ 🔊 permafrost + Keep this word Meanings yǒng jiǔ dòng tǔ 永久凍土 permafrost Its characters 永yǒngforever久jiǔlongHSK 3冻dòngto freezeHSK 5土tǔearthHSK 4