Hangul syllable Tyulm

On a Korean 2-set keyboard, press x, b, f, a. On the Dubeolsik layout, those keys enter ㅌ, ㅠ, ㄹ, and ㅁ; the Korean input method joins ㄹ + ㅁ into the final cluster ㄻ and builds the block. The keys are an input recipe, not a romanized spelling.

Hangul letters are called jamo, and Korean input methods assemble them into syllable blocks. Other Korean layouts can assign different keys.

Does 튦 mean anything by itself?

It is one written Korean syllable, not a pictorial sign. Hangul puts consonant and vowel letters called jamo into blocks; a block’s meaning comes from the Korean word containing it.

Hangul’s creation is associated with 1443; Hunminjeongeum (훈민정음), the manuscript explaining the script, is associated with 1446. Accounts differ on the exact chronology of its public promulgation.

Why can 튦 appear as three Hangul letters?

Unicode treats the two forms as canonically equivalent. The block can be decomposed into ᄐ + ᅲ + ᆱ: an initial consonant, a vowel, and a final consonant cluster. These Hangul letter elements are called jamo.

Unicode NFC normalization, a standard way to combine equivalent text sequences, can recompose the letters as 튦. Software that compares raw code points may still distinguish the one-character and three-character forms.