* It's a misspelling. Perhaps you meant a similar-sounding word, like "mantle" or "mural".
* It's a regional dialect word. Some words are specific to certain locations or communities.
* It's a made-up word. It could be a fictional word or a term invented for a specific purpose.
To help me understand what you mean, please provide more context. For example:
* Where did you encounter this word?
* What was the surrounding text or conversation?
* What language do you think it might be from?
With more information, I can try to give you a more accurate answer.