永久冻土 yǒngjiǔdòngtǔ permafrost Origin Definitions Defs Strokes Stroke Words Sentences Sents 永久 yǒngjiǔ adjectiveadverb permanent permanent; perpetual; everlasting; lasting forever冻土 凍土 dòngtǔ noun frozen earth frozen earth; permafrost; tundra; soil or loose rock in high altitudes or high latitudes where moisture has frozen