이해할 수 없었다

couldn't understand

→ 이해하다
phrase Rare #29,806
couldn't understand A past-tense form meaning that someone was unable to understand something.
KO: 나는 그 설명을 이해할 수 없었다.
EN: I couldn't understand the explanation.

톰은 메리를 이해할 수 없었다

Tom couldn't understand Mary.

난 그녀가 쉬고 싶다는 말을 했을 때 무슨 소린지 이해할 수 없었다

I couldn't understand what she meant when she said she wanted to rest.

— 중경삼림 (1994)