滚瓜烂熟 gǔnguālànshú to know fluently Origin Definitions Defs Strokes Stroke Words Sentences Sents 滚瓜 滾瓜 gǔnguā plump (bound form) round and full; plump like a melon烂熟 爛熟 lànshú to know thoroughly to be very familiar with something or to have a skill mastered completely