This is the 14237th most frequent Russian word.
основанный
Based or founded.
Here, 'основанный' serves as a past participle describing 'проект', meaning an entity that has its basis in something.
Этот проект основанный на новых технологиях.
This project is based on new technologies.
In this sentence, 'основанный' describes 'фильм', specifying a film derived or constructed from a factual foundation.
Фильм, основанный на реальных событиях, очень впечатляющий.
The movie, based on real events, is very impressive.
Here, 'основанный' is used in its negative form to describe 'мнение', indicating an absence of a factual foundation.