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먹으면 안 돼

must not eat

→ 먹다
phrase Rare #20,040
must not eat 먹다 can also mean “drink” when referring to liquids. The phrase can be made polite by changing 돼 to 돼요.
KO: 이건 먹으면 안 돼.
EN: You must not eat this.

그만 둘러보고 이제 밥 좀 먹으면 안 돼?

Can we stop looking around and get something to eat already?

— Tune in for Love (2019)

먹으면 안 돼

You must not eat it.

— 귀향 (2006)

개는 구워 먹으면 안 돼

You shouldn't roast dogs and eat them.

— No Other Choice (2025)