What are the comparative and superlative word of joyfully?

"Joyfully" is an adverb, so it doesn't have comparative or superlative forms in the traditional sense. However, you can express varying degrees of joyful expression by using adverbs like:

Comparative:

* More joyfully

* More happily

* With greater joy

* With increasing joy

Superlative:

* Most joyfully

* Most happily

* With the greatest joy

* With the utmost joy

You can also use adjectives like "joyful" and its comparative and superlative forms:

Comparative:

* More joyful

* Joyfuller

Superlative:

* Most joyful

Ultimately, the best way to express varying degrees of joyfulness depends on the specific context and the desired effect.