What is the comparative and superlative of word interest?

The word "interest" doesn't have direct comparative and superlative forms in the way that adjectives like "big" (bigger, biggest) or "good" (better, best) do.

Here's why:

* Interest can function as both a noun and a verb, and the concept of comparison doesn't apply to nouns directly.

* When used as a verb, it expresses the action of being interested, which is not something you can easily rank in terms of "more" or "most".

Instead of using comparative and superlative forms of "interest", we typically use phrases like:

* More interesting (comparative)

* Most interesting (superlative)

Example:

* "This book is more interesting than the last one I read."

* "That was the most interesting movie I've seen all year."

Let me know if you have any other questions!