This is the 14234th most frequent Russian word.
основан
"Founded" or "based."
Here, 'основан' is used as a past participle of 'основывать,' meaning 'to found or establish,' referring to the establishment of the city.
Город был основан в 18 веке.
The city was founded in the 18th century.
In this sentence, 'основан' takes on a metaphorical meaning, signifying 'based on' or 'founded upon' a certain foundation, in this case, research.
Этот проект основан на современных исследованиях.
This project is based on modern research.
Here, 'основан' conveys that the movie's content is derived from actual occurrences, detailing the basis or origin of the story.