왔단

came

→ 오다
verb · informal, past tense Rare #26,460
came A contracted form of 왔다는, used before a noun or particle in expressions meaning “that [someone] came.”
KO: 네가 어제 왔단 말을 들었어.
EN: I heard that you came yesterday.
Conjugation of 오다

나를 보려고 그 멀리 서 왔단 말 이야?

You came all the way here to see me?

— 순응자 (1971)

내가 마드리드에서 집에 왔단 걸 들은 게지

You heard that I came home from Madrid, right?

— 페인 앤 글로리 (2019)