* It's a misspelling: There might be a similar word in another language, and the spelling is incorrect.
* It's a regional dialect word: It could be a word used in a specific region or community, but not widely known.
* It's a made-up word: It could be a fictional word from a book, movie, or game.
To help me understand:
* Where did you encounter this word? (book, conversation, online, etc.)
* Can you provide any context? (What was being discussed or written about?)
With more information, I might be able to figure out what "Mijina" means.