HSK V7-9
Correct

怀旧

/ huáijiù / 
Strokes

Definition

to feel nostalgic/nostalgia

Example

As a Verb
recall/remember the past or old acquaintances; be nostalgic
1
Wǒ
我
bùzhī
不知
xiànzài
现在
wèihé
为何
rúcǐ
如此
huáijiù
怀旧
  
。

I don't know why I am in such a reminiscent mood.

2
Rén
人
yuè
越
lǎo
老
  
,
yuè
越
xǐhuan
喜欢
huáijiù
怀旧
  
。

The older we grow, the more we tend to remember the past.