Nantoka/구공탄gugongtan구공탄 (gugongtan) is a Korean word meaning “coal briquette”.Meanings1coal briquettePart of speechnounHanja九孔炭Related words구nine구nine구십ninety구십ninety구월September연탄briquet구사일생narrow escape십중팔구almost all석탄coal탄산음료soda탄수화물carbohydrate구천the other worldStudy Korean with flashcards →