万分 wànfēn HSK7 extremely Definitions Defs Origin Strokes Stroke Words Sentences Sents 十万分之一 shíwànfēnzhīyī one hundred thousandth a fraction representing one part out of one hundred thousand, commonly used to describe the scale of a map.万分痛苦 wànfēntòngkǔ excruciating excruciating; extremely painful