알겠냐

understand, get it, know

→ 알다
verb · informal, future tense Uncommon #14,849
understand, get it Informal and often confrontational; used when speaking to someone you’re close to or lower in status.
KO: 내 말 알겠냐?
EN: Do you understand what I’m saying?
know In rhetorical questions, this can express doubt about how much the speaker could know.
KO: 내가 뭘 알겠냐?
EN: What would I know?
Conjugation of 알다

두 눈 똑바로 뜨고 봐 공룡은 이게 공룡 이야, 알겠냐?

Look closely with both eyes open. This is what a dinosaur looks like, got it?

— Space Sweepers (2021)

하지만 내가 뭘 알겠냐?

But what do I know?

— 서부 전선 이상 없다 (2022)

알겠냐 물었어!

I asked if you understood!

— 죽은 시인의 사회 (1989)

알겠냐!

Got it?

— 요짐보 (1961)