Hangul syllable ceulh

On Dubeolsik, switch to Korean input and type c, m, f, g. The IME maps those keys to ㅊ, ㅡ, ㄹ, ㅎ and joins ㄹ + ㅎ into the final cluster ㅀ.

Hangul can be stored as one precomposed syllable or as a canonically equivalent sequence of jamo. They may look alike, while software comparing raw sequences can treat them differently. If the letters stay separate, Korean composition may be off or the field may not support it.

What is 츯 made of?

It has an initial consonant, a vowel, and a final cluster. In 츯, those parts are ㅊ + ㅡ + ㅀ.

Hangul was created in 1443 to write Korean speech when Classical Chinese was the main written medium; its guide, Hunminjeongeum, was published in 1446 to explain the letters and syllable design. Early Korean texts could mix Hangul with Hanja, Chinese characters used in Korean writing, and mark tones. Later Korean writing kept the block layout. Hanja is a neighboring writing tradition, not a piece inside 츯.

The final ㅀ has no single sound in every position. At a word end, it is usually heard as ㄹ; before a vowel, ㅎ can drop while ㄹ links forward; before some consonants, ㅎ can make the next sound come out with a stronger puff of air.

Why does 츯 look different?

Font support changes the drawing, not the character. At rendering time, fonts may vary in the spacing and proportions of 츯; a font that lacks the glyph can show a replacement box.