Correct

成堆

/ chéng duī / 
Strokes

Definition

piles

Example

As a Verb

pile/heap up; form a pile; be (piled) in heaps

1
Xīguā
西瓜
chéngduī
成堆
dì
地
bǎi
摆
zài
在
dìshang
地上
  
。

The water melons were lying on the ground in heaps.

2
Wèntí
问题
chéngduī
成堆
  
。

Problems are stacking/piling up.

3
Jī
积
chéng
成
yī
一
duī
堆

accumulate/amass a pile

4
Duī
堆
chéng
成
yī
一
duī
堆

stack in a pile