kòu
button
The hand radical drives the meaning: fastening or pressing something with your fingers. 口 mainly contributes the sound kòu rather than a mouth-related idea.
这件衬衫的扣子掉了一个。
zhè jiàn chènshān de kòuzi diào le yī gè。
one of this shirt's buttons fell off。
她帮我把最上面的扣子系上了。
tā bāng wǒ bǎ zuì shàngmiàn de kòuzi jì shàng le。
she helped me fasten the topmost button。
QR扣
q r kòu
(Tw) (loanword) QR code
皮带扣
pí dài kòu
belt buckle
扣球
kòu qiú
to smash a ball
扣眼
kòu yǎn
buttonhole
扣子
kòu zi
扣眼儿
kòu yǎn r
erhua variant of 釦眼|扣眼[kou4 yan3]
钮扣
niǔ kòu
variant of 紐扣|纽扣[niu3 kou4]
钩扣
gōu kòu
hook
门扣
mén kòu
door latch
预扣
yù kòu
to withhold
领扣
lǐng kòu
collar button
黏扣带
nián kòu dài
velcro (Tw)