Consider the sentence:
Sorry for the poorly worded sentence, I could not find a way to word it betterly.
Does the word “betterly” exist? Can it be used in a sentence like that?
Consider the sentence:
Sorry for the poorly worded sentence, I could not find a way to word it betterly.
Does the word “betterly” exist? Can it be used in a sentence like that?
No, because "better" already functions as an adverb. So the -ly ending would be redundant. In your example, then, you would simply say, "Sorry for the poorly worded sentence, I could not find a way to word it better."