Hangul Syllable Keok

컼 is one Hangul block: initial ㅋ, vowel ㅓ, and final ㅋ. Read it as a single syllable; a word or phrase supplies its meaning.

Hangeul, the Korean writing system, was designed to record Korean speech with letters arranged into syllable blocks. The first record of Hangeul appears in the Sejong Sillok, a royal chronicle, in 1443; Hunminjeongeum, a book explaining the new letters and how to use them, was published in 1446. The system also made Korean readings of texts written with Chinese characters writable in Korean.

Hangeul was used alongside writing with Chinese characters. In the late Joseon period of Korean history, Hangeul novels and commercial printing helped the script spread beyond elite use.

Someone sent me 컼 alone; what should I read into it?

The syllable gives no message intent by itself. Inside a Korean word, read it with the surrounding syllables. If it arrives alone, it may be a clipped fragment or an input mistake; the conversation, or a quick question to the sender, is needed to tell.