Correct

内裤

/ nèikù / 
Strokes

Definition

underpants/panties/briefs

Example

As a Noun

briefs; underpants; undergarment

1
Nǚshì
女式
nèikù
内裤

knickers; panties; pants

2
Nánshì
男式
nèikù
内裤

men's underpants; men's briefs