Basic Vowels
Learn the 6 basic Korean vowels: ㅏ, ㅓ, ㅗ, ㅜ, ㅡ, ㅣ
The six basic Korean vowels are the foundation of Hangul. Once you can identify ㅏ, ㅓ, ㅗ, ㅜ, ㅡ, and ㅣ on sight and pronounce each one consistently, every other Korean syllable becomes possible — every Hangul block contains at least one vowel, and learning these six first means you can already decode hundreds of common words before you even learn the consonants.
The trickiest of the six for English speakers is ㅓ, sometimes romanised 'eo'. It is not a diphthong — it is a single vowel that sits between English 'uh' and 'aw'. Japanese speakers usually have less trouble because Korean ㅗ and Japanese 'o' are close, but should still practice ㅓ carefully because Japanese has no direct equivalent. Pay particular attention to the mouth shape demonstrated in the audio examples; getting these vowels right at the start saves having to correct your accent later.
How Korean Vowels Work
Korean vowels are written with vertical (ㅏ,ㅓ,ㅣ) or horizontal (ㅗ,ㅜ,ㅡ) strokes. They always need a consonant to form a syllable — when a vowel starts a syllable, it uses the silent consonant ㅇ.
Cultural & Language Note
Hangul was promulgated in 1446 under King Sejong, and the vowel shapes are not arbitrary. Each one is built from three symbols representing heaven (a dot, now a short stroke), earth (the horizontal line ㅡ), and a standing person (the vertical line ㅣ). ㅗ is the dot above earth; ㅜ is the dot below it. Once you see this logic, the vowels stop looking like random marks and start looking like a system — which is exactly what they are.
Common Mistakes to Avoid
The single biggest error is treating ㅓ as if it were ㅗ. They are different vowels and they distinguish real words: 어리다 (to be young) versus 오리 (duck). Learners who let these blur together early spend months undoing the habit. The second trap is ㅡ, which has no English or Japanese equivalent — it is not 'u'. Keep your lips flat and unrounded, as if you were saying 'ee' but pulling the tongue back.