凍とう上じょうとうじょうMeanings1nounfrost heaving; frost heavegeologyGeological term for the upward swelling of soil caused by freezing conditions.寒かん冷れい地ちでは、凍とう上じょうによって道どう路ろが持もち上あがることがある。In cold regions, roads can be lifted by frost heaving.