This is the 13064th most frequent Russian word.
марвело
It seems "марвело" does not appear to be a standard Russian word. Could it be a typo or a name?
In this sentence, 'Марвело' is used as a proper noun, likely referring to an author's name.
Я прочитал новую книгу Марвело, и она была очень интересной.
I read the new book by Marvelo, and it was very interesting.
Here, 'Марвело' is used as a proper noun indicating the name of a person who contributes ideas.
Марвело предложил прекрасную идею для проекта.
Marvelo proposed an excellent idea for the project.
In this case, 'Марвело' again serves as a proper noun referencing a participant in the discussion.