말아야

must not, should not

→ 말다

auxiliary Rare #18,872

must not, should not Used after 지 to say that an action should not or must not be done.

KO: 도서관에서는 크게 말하지 말아야 해요.

EN: You should not speak loudly in the library.

Conjugation of 말다

Necessitative

말아야