What is the comparative and superlative to word merry?

The comparative and superlative forms of "merry" are not regularly formed. Instead, we use different words to express degrees of merriment:

* Comparative: Merrier (less common) or more cheerful

* Superlative: Merriest (less common) or most cheerful

While "merrier" and "merriest" are technically the comparative and superlative forms of "merry," they are rarely used in modern English. It's more common to use "more cheerful" and "most cheerful" to express increasing degrees of merriment.