* A misspelling of a word: Could you double-check the spelling? Perhaps you meant "than" or "canal"?
* A word from another language: If it's from a different language, please let me know which one. I can try to find a translation for you.
* A specific term: It's possible "thanal" is a specialized term used in a particular field. If you can provide more context, I might be able to help.
Please provide more information so I can help you understand the meaning of "thanal."