Correct

愁思

/ chóu sī / 
Strokes

Example

As a Noun

sad/melancholy thoughts; deep longing

1
Dòu
读
le
了
nā
那
shǒu
首
shī
诗
  
,
tā
她
xiànrù
陷入
wúxiàn
无限
de
的
chóusī
愁思
  
。

She sank/fell into a state of profound melancholy on reading that poem.