Correct

一窍不通

/ yī qiào bùtōng / 
Strokes

Definition

lit. doesn't (even) enter a single aperture (of one's head)/I don't understand a word (idiom)/it's all Greek to me

Example

Definition

be completely ignorant of; know nothing about; lack the slightest knowledge of; be utterly ignorant of

1
Wǒ
我
shì
是
wàiháng
外行
  
,
duì
对
gōngchéng
工程
jìshù
技术
yīqiàobùtōng
一窍不通
  
。

I am a layman, knowing nothing when it comes to engineering and technology.

2
Tā
他
duì
对
yǔyánxué
语言学
yīqiàobùtōng
一窍不通
  
。

He has no grounding in linguistics. / Linguistics is a closed/sealed book to him.

3
Duì
对
yīnyuè
音乐
yīqiàobùtōng
一窍不通

be musically illiterate

4
Duì
对
wénxué
文学
yīqiàobùtōng
一窍不通

know nothing about literature