What is the comparative and superlative form of eerily?

"Eerily" is an adverb, and adverbs don't have comparative or superlative forms like adjectives do.

To express different levels of eeriness, you could use phrases like:

* More eerily (comparative)

* Most eerily (superlative)

* Incredibly eerily

* Extremely eerily

* Unusually eerily

You could also use synonyms that imply different levels of eeriness, such as:

* Uncannily

* Strangely

* Spookily

* Ominously

* Uneasily