Correct

洼

/ wā / 
Strokes

Definition

depression/sunken/swamp

Example

As a Noun

low-lying area; depression

1
Shuǐwāzǐ
水洼子

water-logged depression

As an Adjective

hollow; low-lying

2
Zhè
这
yīdài
一带
dìshì
地势
tài
太
wā
洼
  
。

This plot (of land) dips down too much.

As a Verb

sink; slope downward

3
Dìmiàn
地面
wā
洼
xiàqù
下去
le
了
yī
一
kuài
块
  
。

A patch of the land sank.