燃もゆる土つちMeanings1expressioncoal; peatarchaicArchaic expression literally meaning 'burning earth', used historically for combustible earthy materials such as coal or peat. Not used in modern Japanese.古こ文ぶん書しょには「燃もゆる土つち」を燃ねん料りょうとして使つかった記き述じゅつがある。In old documents, there are descriptions of using 'burning earth' as fuel.
