火か口こうTop 25000MeaningsNoun1. (volcanic) crater; caldera2. burner (of a boiler)Kanji used火fire口mouthPitch accentかこうUsed in vocabulary火か口こう湖こcrater lakeNoun火か口こう原げんcrater floor; crater basinNoun火か口こう壁へきcrater wallNoun火か口こう原げん湖こcrater lakeNoun