What is the comparative and superlative form of legibly?

"Legibly" is an adverb, and adverbs don't have comparative and superlative forms in the same way adjectives do.

Here's why:

* Adjectives describe nouns: They tell us more about the thing or person being discussed. Examples: *big, small, red, happy*

* Adverbs describe verbs, adjectives, or other adverbs: They tell us more about how something is done, how much, or to what extent. Examples: *quickly, slowly, very, really*

To express different degrees of legibility, you would use words like:

* More legible (comparative)

* Most legible (superlative)

For example:

* "The first document was legible, but the second one was even more legible."

* "Of all the handwriting samples, this one is the most legible."