Sound Change Basics

Batchim ㄱ, ㄷ, and ㅂ change into their nasal cousins ㅇ, ㄴ, and ㅁ whenever the very next sound is ㄴ or ㅁ. 한국말 is spelled with a ㄱ batchim under 국, but because 말 starts with ㅁ, it softens into [한궁말]. The same thing happens in 감사합니다 — the ㅂ batchim in 합 turns into ㅁ before the ㄴ in 니다, giving [감사함니다]. Your mouth is just taking a shortcut: ㄱ, ㄷ, and ㅂ are hard stops, while ㄴ and ㅁ are nasal, so blending them together is easier to say fast.

Sometimes a plain consonant hardens into its tense version when it follows certain batchim — 학교 is a textbook example, pronounced [학꾜] instead of a soft 'gyo'. You'll meet this constantly in real Korean, especially after ㄱ, ㄷ, and ㅂ batchim. For now, just notice that it happens; the spelling stays 학교 either way.

Nasalization and tensification aren't rules you calculate word by word — native speakers never think about them consciously either. The more Korean you hear, the more these shifts start to feel automatic and even predictable. Your job right now is just recognition: when a word sounds different from its spelling, you'll know it's one of these patterns at work, not a mistake in your listening. Trust your ears, keep listening, and the patterns will settle in on their own.

Look at what you can do now: read any Hangul syllable block, handle batchim, and recognize why spoken Korean shifts away from its spelling. That's the entire writing system — every word in Korean, from here on, is built from exactly what you've already learned. Level 1 picks up with survival Korean: greetings, ordering food, asking directions, and real conversations you'll actually have. You're not a beginner anymore — you're someone who can read Korean.