An vs Mot: Why Korean Has Two Ways to Say No

One Wrong Word at a Korean Table

You reach for Korean’s version of “no.” You say it. The whole table goes quiet. People look concerned. Someone asks if you’re okay.

Part of the Korean Grammar — Make Sense of It, Not Just Memorize series — start there if you’re new.

Korean has two negatives where English only has one. Pick the wrong one and you’ve said something completely different. The drink scenario above? You didn’t say “I don’t drink.” You said you physically can’t. That implies a health problem. Koreans noticed.

The Split English Never Taught You

English uses “not” for both. Korean makes you declare which one. In my classes, 못 mot is consistently where beginners trip. Not because the grammar is hard. Because most learners don’t realize a choice is even being made. When English says “I’m not going,” Korean asks: by decision or by circumstance?

Both words go right before the main verb. Same position, very different message.

Quick Check Before You Go

Your flight got canceled. You’re texting a friend: “내일 nae-il ___ 가요 ga-yo.”

안 an or 못 mot?

Frequently Asked Questions

What exactly is the difference between 안 and 못 in Korean?

안 an is a decision. 못 mot is a constraint. One wrinkle worth knowing: in food contexts, 밥 못 먹어요 bap mot meogeoyo can actually sound more polite than 밥 안 먹어요 bap an meogeoyo. 못 offers a reason for not eating. 안 sounds like a flat refusal. The right choice depends on the situation.

Can I use 못 to turn down an invitation?

Yes, and it works naturally. 못 가요 mot ga-yo implies something external came up (work, travel, a scheduling conflict) and carries an unspoken “I wish I could.” If you simply prefer not to go, 안 가요 an ga-yo is more honest. Both are grammatically correct. The choice tells the listener how much control you had over the situation.

Is 안 only for casual preferences?

Not at all. 안 covers any deliberate decision, including firm personal rules. If you don’t eat meat on principle, 고기 안 먹어요 gogi an meogeoyo is exactly right. The deciding factor is control: are you choosing this, or is something stopping you? Choice is 안 an. Obstacle is 못 mot.

안 an = I decided not to. 못 mot = something stopped me. Korean makes you say which one, every time.

🔧 Practice what you just read: try the free Korean Verb Conjugator — 500 verbs, 12 forms each, with romanization.