蜉かげろう・カゲロウ蜉蝣表記・読み:蜻蛉・かげろう・カゲロウ1mayfly名詞word usually written using kana alone2ephemerality (of life)名詞word usually written using kana alone3dragonfly名詞archaicword usually written using kana alone札へ残す語をコピー