Correct

扑冬

/ pū dōng / 
Strokes

Example

As an Onomatope

thump; thud ［sound of something heavy dropping on the ground］

1
Pū
扑
dōng
冬
yī
一
shēng
声
shuāidǎo
摔倒
zài
在
dì
地

fall with a thump on the ground