How "merry" became a comparative while "more" came before that?
Native speaker’s answer
Rebecca
"The more the merrier" is an English idiom that means the more people that are a part of something, the better or more enjoyable it will be. Because it is an idiom, it is just simply worded that way. Ex: A: Can I bring a friend with me to your party? B: Sure, the more the merrier!