ㄱ vs ㄲ vs ㅋ: Korean plain, tense and aspirated consonants

Updated November 2026 · Written by the PixelSpeech team, founded by a speech-language pathologist

Korean has three versions of several consonants. To most learners they sound alike at first, but they change meaning: 달 is moon, 딸 is daughter and 탈 is mask.

The three groups

ㅅ and ㅆ only have two versions: plain and tense. There is no aspirated ㅅ.

Three things to listen for

1. Air

Hold a tissue in front of your mouth. With ㅋ ㅌ ㅍ ㅊ it should move clearly. With ㄲ ㄸ ㅃ ㅉ it should barely move. With ㄱ ㄷ ㅂ ㅈ it moves a little.

2. Tension

For tense consonants, tighten your throat and press the closure firmly for a split second before releasing it. It can feel like a tiny pause or a "catch" before the vowel.

3. Pitch

In standard Seoul Korean, a word that starts with a tense or aspirated consonant usually starts on a higher pitch than a word that starts with a plain one. Many native speakers rely on this pitch difference as much as on the air. If your 달 and 탈 sound the same, try starting 탈 higher.

Plain consonants change between vowels

Plain ㄱ ㄷ ㅂ ㅈ become voiced, like g, d, b and j, between vowels and after ㄴ ㄹ ㅁ ㅇ. In 고기, the first ㄱ is close to a light k and the second sounds like g. In 바보, the second ㅂ sounds like b. This is normal, not a mistake.

Minimal pairs to practice

Tips by native language

• English: English p, t, k at the start of a word already have a puff of air, so they are close to ㅍ ㅌ ㅋ. The k in "sky", which has no puff, is a good starting point for ㄲ. Learners often say plain ㄱ too strongly; keep it light.
• Japanese: the small っ before a consonant gives a good feeling for tense consonants: 「いっか」 is close to 이까. Japanese has a voiced and voiceless split instead of air and tension, so focus on the tissue test.
• Chinese: Mandarin aspirated p, t, k are close to ㅍ ㅌ ㅋ. Unaspirated b, d, g sit between Korean plain and tense, so learners often merge ㄱ and ㄲ. Use pitch to separate them.
• Vietnamese: Vietnamese t is unaspirated and th is aspirated, which helps with ㄸ and ㅌ. The plain series is usually the hardest; practice 달 / 딸 / 탈.

Check your own consonants

PixelSpeech scores the first consonant of every syllable separately, so a ㄲ said as ㄱ shows up as a weak sound instead of hiding inside an overall score. Your weak consonants are tracked over time, with coaching on airflow and tension and daily practice sentences that use them.