Hangul syllable Rok

You need its Korean word or context to read it. The Hangul jamo (letters used to build syllable blocks) are ㄹ, ㅗ, and ㅋ: an opening consonant, a vowel, and a final consonant. That final consonant is called jongseong, also known as batchim. The Unicode label “rok” names this sequence; it does not make 롴 the English word “rock.”

Hangul's syllable-block system was created in 1443 under King Sejong. Hunminjeongeum, an explanatory book published in 1446, described the letters and a way to write Korean without relying on Chinese characters or Korean conventions that adapted them to Korean, including Idu, Gugyeol, and Hyangchal. Hangul later appeared in Buddhist and Confucian texts, practical writing, laws, and government records. That history belongs to the writing system rather than to this individual block.

What if someone sends 롴 alone?

A lone 롴 does not reveal the sender’s word or tone. It could be a character sample or a fragment, but the character alone cannot tell you which. Within a Korean word or name, the neighboring syllable blocks supply the word. Ask what it belongs to.