陥かん没ぼつ湖こかんぼつこMeanings1nounlake formed in a volcanic calderaGeological term for a lake that occupies a depression formed by volcanic collapse.十と和わ田だ湖こは陥かん没ぼつ湖この一いち例れいです。Lake Towada is an example of a lake formed in a volcanic caldera.