Correct

根底

/ gēndǐ /
Strokes

Definition

foundation/grounding/background/what lies at the bottom of sth/root/cause

Example

As a Noun

foundation; root; grounding

1
zài
shāngjiè
商界
méishénme
没什么
gēn
根底
  

He has no roots in business circles.

2
法语
gēn
根底
hǎo

have a solid foundation in French; be well-grounded in French

3
Gēn
根底
jiān
  
/
shēn

have a shaky/solid foundation

4
xià
打下
láo
牢固
de
xiězuò
写作
gēn
根底

gain firm root in writing

As a Noun

cause; root; background

5
lexiè
了解
rén
de
gēn
根底

do not know the background of a person

6
Zhuīwèn
追问
gēn
根底

enquire into the cause of a matter