囊萤映雪 nángyíngyìngxuě to study by fireflies and snow Origin Definitions Defs Strokes Stroke Words Sentences Sents 囊 náng to encase (literary) to put into a bag; to wrap or encase like a bag萤 螢 yíng noun firefly (bound form) firefly; glow-worm; usually refers to the 萤火虫 yínghuǒchóng映雪 yìngxuě reading by reflected snowlight to study by the light reflected from snow, describing a person who is extremely diligent despite being very poor