HSK C7-9
Correct

凝

/ níng / 
Strokes

Definition

to congeal/to concentrate attention/to stare

Example

As a Verb
congeal; coagulate; curdle; condense
1
Yǒuxiē
有些
qìtǐ
气体
jiàngwēn
降温
hòu
后
níng
凝
wéi
为
yètǐ
液体
  
。

Some gases condense into liquid when cooled down.

2
Xuè
血
jiàn
见
kōngqì
空气
jí
即
níngjié
凝结
  
。

Blood coagulates when it meets the air.

3
Shuǐ
水
níng
凝
chéng
成
bīng
冰
  
。

Water congeals into ice.

4
Xiānxuè
鲜血
níngchéng
凝成
de
的
zhàndòu
战斗
yǒuyì
友谊

militant friendship cemented with blood

As a Verb
concentrate; focus; fix