Correct

扑簌

/ pū sù / 
Strokes

Example

As an Onomatope

(of tears) trickling down

1
Lǎofùrén
老妇人
pūsù
扑簌
pūsù
扑簌
diào
掉
xià
下
yǎnlèi
眼泪
  
。

The old woman's tears trickled down her cheeks.