Correct

迟暮

/ chímù / 
Strokes

Definition

past one's prime

Example

As a Noun

dusk; twilight; nightfall

1
Wǒmen
我们
zài
在
xiāngjiān
乡间
sànbù
散步
dào
到
chímù
迟暮
shífēn
时分
  
。

We walked in the country till almost nightfall.

As a Noun

late life; twilight of one's life; old age

2
Jìnrù
进入
chímùzhīnián
迟暮之年

be in the twilight of one's life

3
Nián
年
jìn
近
chímù
迟暮

approach old age; become advanced in years