noun🔗Share黒曜石A type of black glass produced by volcanoes."The ancient tools were made of obsidian, a black, volcanic glass. "古代の道具は、黒い火山ガラスである黒曜石で作られていました。geologymaterialsubstanceChat with AIVocabulary GamePractice Reading
adjective🔗Share黒いBlack"Her obsidian hair shone in the sunlight. "彼女の黒い髪は太陽の下で輝いた。colormaterialgeologyappearanceChat with AIVocabulary GamePractice Reading