Pulverization, Smashing
noun, verbal noun
To powder I will smash it! If I do that, it's pulverization and smashing.
ふんさい
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
私の従兄弟は、転んで左足の膝のお皿を粉砕骨折しました。
My cousin fell and got a comminuted fracture in his left kneecap.