裤

kù

underpants

trousers; pants

clothing (衤) + sound kù (库) = trousers

The clothing radical (衤) marks this as a garment. 库 contributes the sound kù and doesn't add meaning here.

衤+库→裤

库StorehousePhonetic

衤ClothingSemantic

G弦裤

g xián kù

G-string

连裤袜

lián kù wà

pantyhose; tights

连体裤

lián tǐ kù

jumpsuit

长裤

cháng kù

trousers

开裆裤

kāi dāng kù

open-crotch pants (for toddlers)

靴裤

xuē kù

boot cut (e.g. of jeans etc)

裤兜

kù dōu

pants pocket

裤口

kù kǒu

trouser leg opening

裤子

kù zi

trousers

裤带

kù dài

belt (in trousers)

裤管

kù guǎn

trouser leg

裤腰

kù yāo

waist of trousers