Correct

嘻

/ xī / 
Strokes

Definition

laugh/giggle/(interjection expressing admiration, surprise etc)

Example

As an Interjection

[used when exclaiming in admiration, wonder, etc]

1
Tā
他
jīngxiàn
惊羡
dì
地
xī
嘻
le
了
yī
一
shēng
声
  
。

He gave a gasp of admiration.

2
Xī
嘻
  
,
yì
异
zāi
哉
  
!

Oh, how weird!

As an Onomatope

[referring to the sound of merry laughter] giggle

3
Tā
她
xīxīdexiào
嘻嘻地笑
  
。

She burst into giggles.