Taivo A Taiwan Mandarin dictionary

一竅不通

yīqiàobùtōng

ㄧ ㄑㄧㄠˋ ㄅㄨˋ ㄊㄨㄥ

Simplified 一窍不通

  1. 1lit. doesn't (even) enter a single aperture (of one's head)
  2. 2I don't understand a word (idiom)
  3. 3it's all Greek to me
Example

我對此一竅不通。

wǒ duì cǐ yíqiàobùtōng

It's all Greek to me.

Keep 一竅不通 and it comes back until you know it.

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