Dictionary/重油じゅうゆJuuyu重油 (Juuyu) is a Japanese noun meaning “heavy oil, fuel oil”.Meaningsnounheavy oil; fuel oilKanji in 重油重heavy油oilRelated words重いheavy主chief重要important重ねるto pile up八重eightfold慎重careful油oil醤油soy sauce油断negligence貴重precious重大serious重なるto be piled up