How do you spell whach?

"Whach" is not a standard English word. It is likely a misspelling or a word from a specific dialect or jargon.

Possible corrections:

* Watch: To observe or look at something.

* Whack: To hit something forcefully.

* Which: A word used to ask for a choice.

* What: A word used to ask for information.

If you can provide more context, I may be able to offer a more accurate spelling suggestion.