알아야

must know, have to know

→ 알다
verb Uncommon #6,526
must know, have to know The ending -아야 expresses that knowing something is necessary for what follows.
KO: 주소를 알아야 찾아갈 수 있어요.
EN: I have to know the address to find the place.
Conjugation of 알다

다들 확실히 알아야 하니까!

Because everyone needs to know for sure!

— 데드맨스 와이어 (2026)

아니, 아니, 이유는 알아야 될 거 아닙니까, 이유는, 예?

No, no, you have to know the reason, don't you? The reason, right?

— Svaha: The Sixth Finger (2019)

내가 알아야 하는데 아직 모르는 게 있어?

Is there something I need to know that I don't yet know?

— 귀향 (2006)

그러고 싶은데 방법을 알아야 끄지!

I want to do that, but I need to know how to turn it off!

— 크리에이터 (2023)

꼭 알아야 한다고

that you absolutely need to know

— 원 배틀 애프터 어나더 (2025)

누구나 수영할 줄 알아야 한다.

Everyone should know how to swim.

아치메드, 니가 알아야 될 게 있어

Archimedes, there's something you need to know.

— 이글라 (1989)

모두들 알아야 만해

Everyone must know.

— 시네마 천국 (1988)

자네들은 알아야 하네

You must know.

— 잠입자 (1979)