墙

铜墙铁壁

tóng qiáng tiě bì

copper wall, iron bastion (idiom); impenetrable defense

防火墙

fáng huǒ qiáng

firewall

隔墙有耳

gé qiáng yǒu ěr

the walls have ears (idiom)

骑墙

qí qiáng

to sit on the fence (in a dispute)

不撞南墙不回头

bù zhuàng nán qiáng bù huí tóu

to stubbornly insist on one's own ideas (idiom)

人墙

rén qiáng

human barricade; (soccer) defensive wall

付费墙

fù fèi qiáng

(computing) paywall (loanword)

佛跳墙

fó tiào qiáng

lit. Buddha jumps over the wall, name for a Chinese dish that uses many non-vegetarian ingredients

兄弟阋于墙，外御其侮

xiōng dì xì yú qiáng , wài yù qí wǔ

internal disunity dissolves at the threat of an invasion from outside (idiom)

兄弟阋墙

xiōng dì xì qiáng

internecine strife (idiom); fighting among oneself

哭墙

kū qiáng

Wailing Wall, or Western Wall (Jerusalem)

围墙

wéi qiáng

perimeter wall