HSK 4 HSK C3/W3/V3
Correct

/ nèi  /
Strokes

Collocation

1
国内
2
室内
3
市内
4
年内
5
请勿入内

Definition

内 is a Noun, which means [ inner; inside; within ].

Example

As a Noun.
1
Jīntiān
今天
xià
下雨
  
,
sài
比赛
gǎi
zài
shìnèi
室内
jìnxíng
进行
  

It was raining today and the race was played indoors.

2
zài
liǎng
zhōu
nèi
zuò
le
liǎng
shǒushù
手术
  

He had two surgeries in two weeks.

3
Zhè
jiàn
fu
衣服
tiān
nèi
可以
tuìhuàn
退换
  

This garment can be returned and exchanged within seven days.

4
Chúle
除了
gōngzuò
工作
rényuán
人员
wài
以外
  
,
其他
de
rén
qǐng
请勿
nèi
  

Except for the staff, other people are not allowed to enter.