* It's a misspelling: There might be a similar word you're thinking of. Could you double-check the spelling?
* It's a specific term: It could be a term used in a particular field or context. Can you provide more information about where you encountered this word?
* It's a fictional word: It could be made up for a fictional story or game.
Please provide more context so I can help you figure out what "yadhtrib" means.