ed ‧ i ‧ to ‧ ri ‧ a ‧ lize BrE AmE ( also editorialise British English ) /ˌedəˈtɔːriəlaɪz, ˌedɪˈtɔːriəlaɪz/ verb [intransitive]
to give your opinion and not just the facts about something, especially publicly
editorialize on/about/against etc
The BBC is not supposed to editorialize about the news.