냈지

paid, caused, got angry

→ 내다
냈 Past tense + 지 Clause-ending marker for assertion or confirmation
verb · informal, past tense Rare #29,939
paid The ending -지 can seek confirmation or emphasize something the speaker assumes is known.
KO: 내가 어제 등록금을 냈지.
EN: I paid the tuition yesterday.
caused Often used with 사고 (accident) to mean “caused an accident.”
KO: 그 운전자가 사고를 냈지.
EN: That driver caused an accident.
got angry Used in the expression 성을 내다, meaning “to get angry.”
KO: 그는 작은 일에도 성을 냈지.
EN: He got angry even over small things.
Conjugation of 내다

언니가 내 등록금 냈지?

You paid my tuition, didn't you?

— Tune in for Love (2019)

사고는 자네가 냈지

You caused the accident, didn't you?

— 머시니스트 (2004)