I am wondering which one of those are right in the case of the given dialogue or if both of them are so but with a slight difference in meaning.
It's an Adjective for being happy.
It's an adjective to being happy.
Speaker A: What does merry mean here? I thought it was an adjective!
Speaker B: Actually it is an adjective and it means happy.
Speaker A: I understand that it's an adjective for being happy but look it functions as an adverb in that sentence. Maybe it means sth else here.
By the way I know that without 'being' only the first sentence would sound good but I wonder if with being that would change.