How to read: ぎゃくぼたる
Pronunciation: 
Names and idioms with total stroke of 20:
中薮 良太郎 怨情 掻い出す 去年草
Names and idioms similar to 逆蛍:
蛍烏賊 蛍夏 蛍※ 逆流性食道炎 天逆鉾
Yojijukugo(idioms with 4 Kanji characters) including 逆蛍:
莫逆之友 車胤聚蛍 雪案蛍窓
Proverbs including 逆蛍:
莫逆の友 金言耳に逆う 鳴かぬ蛍が身を焦がす