xī
(interjection expressing surprise, grief etc)
variant of 嘻[xi1]
This is an interjection or onomatopoeia — it represents a sound.
嘻嘻
xī xī
hee hee
嘻皮
xī pí
hippie (loanword)
嘻皮笑脸
xī pí xiào liǎn
see 嬉皮笑臉|嬉皮笑脸[xi1 pi2 xiao4 lian3]
嘻哈
xī hā
hip-hop (music genre) (loanword)
笑嘻嘻
xiào xī xī
grinning