底

卧底

wò dǐ

to hide (as an undercover agent)

交底

jiāo dǐ

to fill sb in (on the details of sth)

基底

jī dǐ

plinth; base; substrate

底边

dǐ biān

base (of a triangle)

追根究底

zhuī gēn jiū dǐ

to get to the heart of the matter

底比斯

dǐ bǐ sī

Thebes, place name in ancient Egypt

釜底抽薪

fǔ dǐ chōu xīn

to take drastic measures to deal with a situation

底层

dǐ céng

ground floor; first floor

刨根问底

páo gēn wèn dǐ

to dig up roots and inquire at the base (idiom); to get to the bottom of sth

幼发拉底河

yòu fā lā dǐ hé

Euphrates River

釜底游鱼

fǔ dǐ yóu yú

a fish at the bottom of the pot (idiom)

铺底

pù dǐ

shop fittings