* Misspelling: Perhaps you meant a different word altogether. Can you double-check the spelling?
* Slang or dialect: It could be a slang term or a word used in a particular dialect or region. If you can provide more context, I might be able to help.
* Foreign word: It could be a word from another language. If you can tell me the language, I might be able to find a translation.
Please provide more information so I can help you understand the meaning of "tenebo"!