This is the 13395th most frequent Korean word.
때린
"때린" means "hit" or "struck" in English (past tense).
때린 is used as the past tense of the verb 때리다 (to hit), modifying the subject '그가' (he), showing an action completed in the past.
그가 나를 때린 후에 사과했다.
He apologized after hitting me.
때린 is used as the past tense adjective form describing the noun '손' (hand), indicating the nature of the hand as one that has hit.
때린 손이 다시는 나에게 닿지 않을 것이다.
The hand that hit will never touch me again.
때린 is used before 이유 (reason) to specify the act of hitting for which the reason is being inquired.