이더라

was, turned out to be

→ 이다
이 to be + 더라 Retrospective past
auxiliary · informal, past tense Rare #26,394
was, turned out to be Used when recalling or reporting something the speaker observed or realized.
KO: 그분은 우리 학교 선생님이더라.
EN: That person turned out to be a teacher at our school.
Conjugation of 이다

오늘이 며칠 이더라?

What’s today’s date again?

— A Moment to Remember (2004)