How do you spell chillyer?

"Chillyer" is not a word in the English language. It's likely a misspelling.

Do you mean one of these words?

* Chiller: A device that cools things, like a refrigerator or air conditioner.

* Chilly: Feeling cold or slightly cold.

* Chillier: Comparative form of "chilly," meaning colder.

Let me know if you meant one of these words or had something else in mind!