12345678910111213141516Keywordfirefly [old]fireflyStrokes16ReadingsケイほたるStroke orderComposed of𤇾roof on fire虫insectUsed in vocabulary螢けい光こうfluorescenceNoun螢けい雪せつdiligence in studying (e.g. continuing to study even in such poor light as offered by a firefly or that reflected by snow); diligent studyNoun