How do you spell shiveress?

"Shiveress" is not a standard English word. It's likely a misspelling or a made-up word.

Here are some possible alternatives depending on what you mean:

* Shiverer: This is the correct spelling of the noun describing someone who shivers.

* Shivering: This is the present participle of the verb "to shiver."

* Shivery: This is an adjective describing something that causes shivering.

If you could provide more context about how you intend to use the word, I might be able to give you a more precise answer.