The superlative for the word interesting is most interesting. A superlative is typically formed by adding the suffix -est but can also be formed by adding the word most to the word. Examples include most recent and weakest.
comparative: more interesting superlative: the most interesting
comparative: more interesting superlative: the most interesting
most interesting
Comparative: more affectionate and more interesting Superlative: most affectionate and most interesting
more interesting, most interesting
more interesting, most interesting
Interest is a noun and a verb and, as such, does not have a comparative or a superlative form. If that was interesting, they would be more interesting and most interesting.
most interesting
more interesting, most interesting
more interesting, most interesting
more interesting, most interesting
more interesting, most interesting