Correct

裤衩

/ kùchǎ / 
Strokes

Definition

underpants

Example

As a Noun

underpants (by men or women); undershorts (by men)

1
Sān
三
jiǎo
角
kùchǎ
裤衩

briefs; panties/knickers (for women)

2
Yī
一
tiáo
条
kùchǎ
裤衩

a pair of underpants