理り解かいの範はん疇ちゅうを超こえる

expression, ichidan verb

go over one's head; be beyond comprehension

Used when something is too difficult or complex to understand. Often implies the subject matter exceeds the listener's knowledge or intellectual capacity.

• 彼かれの説せつ明めいは難むずかしすぎて、私わたしの理り解かいの範はん疇ちゅうを超こえていた。

  His explanation was too difficult and went over my head.