Explanation 1 · Principles of Creation

Exceptional cases: ㆁ ㄹ ㅿ

    However, ㆁ [ŋeu-iŋ] is an exception because its sound is
    different from the others.
    ㄹ (Reu-iL) is a half-coronal sound, and ㅿ(Zeu-iZ) is a
    half-dental sound. They are also shaped after the tongue
    and teeth, but their shapes are different, so the meaning of
    the added strokes is also different. In their cases, the strokes
    do not indicate a stronger sound.
    Unlike other consonants, the sounds of ㄹ(Reu-iL) and ㅿ
    (Zeu-iZ) are not intensified by the additional strokes.




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