Hangul syllable 뀈

It is one Korean syllable block, not a word by itself.

Inside a Korean word, the neighboring syllables help determine how to read it and what the whole word means. Sent alone, it is a fragment rather than a complete message; ask for the Korean word or sentence around it.

Hangul was built to fit Korean speech

Hangul was created to make writing Korean easier for more people. The first record of Hunminjeongeum, the new script, dates to 1443; a book explaining it appeared in 1446.

Earlier Korean writing used Chinese characters, including Idu, a method that adapted them to write Korean. Hangul instead arranges consonant and vowel jamo—alphabetic letters—into syllable blocks. Their square layout resembles Chinese characters, but Hangul's letters are not directly derived from them.

South Korea generally calls the script Hangul; North Korea commonly calls it Chosŏn'gŭl.

How do I type 뀈?

Enter ㄲ, then ㅞ, then ㅋ in order.

Use a Korean IME, a keyboard input method that assembles Hangul letters into syllables. If the letters stay separate, the field may be in a mode that does not compose them. That is an input-state difference, not a different reading.