Why 맞다 Sounds Like [맏따]: 자음동화 Explained

Consonant Assimilation (자음동화) changes how 맞다 is actually pronounced.

The Written Form vs. Actual Sound

맞다 is written with the characters you see, but Koreans actually say [맏따]. This isn't sloppy speech — it's a systematic sound rule called 자음동화 (Consonant Assimilation). If you read Korean letter-by-letter, you'll pronounce 맞다 as "matda". But the actual pronunciation is [맏따] ("mattta"). This gap between spelling and pronunciation is one of the trickiest parts of Korean for learners.

Why English Speakers Get It Wrong

English has sound changes too (think "don't you" → "doncha"), but they're optional and informal. Korean sound changes are MANDATORY — every native speaker applies them automatically, and NOT applying them marks you as a beginner. The challenge is that Korean is written phonemically (how it's structured) not phonetically (how it sounds). Once you learn the rules, you can predict the actual pronunciation of any word — even ones you've never seen before.

How It Works

ㅈ at syllable end → ㄷ, then ㄷ+ㄷ tenses → [맏따]. The 자음동화 rule: ㄱ before ㅁ becomes ㅇ (nasalization subtype) → [궁물]. This rule applies consistently across Korean. Once you internalize it, you'll automatically hear and produce the correct pronunciation. Listen to native audio and compare the written form with what you actually hear.

Real Examples

• 맞다 → [맏따] (mattta) — "to be correct" Written: matda → Spoken: mattta • 국물 → [궁물] (gungmur) — "broth/soup stock" Written: gukmur → Spoken: gungmur • 받는 → [반는] (banneun) — "receiving" Written: batneun → Spoken: banneun • 있는 → [인는] (inneun) — "existing" Written: itneun → Spoken: inneun

Common Mistakes

❌ Reading 맞다 as "matda" (letter-by-letter) ✅ Saying [맏따] as "mattta" (with 자음동화 applied) → Apply 자음동화 to get the natural pronunciation. Reading each character separately gives the wrong sound. ❌ Thinking the pronunciation change is optional ✅ 자음동화 is mandatory in standard Korean → Unlike English casual contractions, Korean sound changes aren't optional — they're part of correct pronunciation.

Quick Tip

Listen to native speakers and focus on how syllable boundaries shift. Practice saying [맏따] out loud 10 times. Then try reading 맞다 and automatically applying the 자음동화 rule. A useful drill: cover the pronunciation, look at the written form, predict the actual sound, then check. This builds the mental habit of automatic sound change application.

자음동화: 맞다 → [맏따]

Examples

맞다 — matda — to be correct

[맏따] — mattta — to be correct

국물 — gukmur — broth/soup stock

받는 — batneun — receiving

있는 — itneun — existing