How do you spell tain?

The word "tain" is not a common English word. It's possible you're thinking of a different word, or it might be a misspelling of another word.

Here are some possible scenarios:

* You're thinking of "tain't," which is a slang contraction of "it ain't" and is considered non-standard English.

* You're thinking of a word with a similar pronunciation but different spelling, such as "tain" (which might be slang for "take" or "gain").

* It's a misspelling of another word entirely.

Could you provide more context or information about where you encountered this spelling? This will help me determine the correct spelling.