더냐

Was it ...?, Did they ...?

Structure
Vowel-final: 하다 → 하 + 더냐? → 하더냐? (did someone do it?)
Consonant-final: 먹다 → 먹 + 더냐? → 먹더냐? (did someone eat?)
ㄹ-final: 살다 → 살 + 더냐? → 살더냐? (did someone live?)
Explanation

Kimchi Reader

Used to ask about what the listener personally saw or heard in the past.