This is the 687th most frequent Bulgarian word.
основен
Primary; fundamental; main.
Here, 'основен' is appropriately translated as 'basic', referring to elementary or fundamental tools or skills.
Използването на основни програми за обработка на текст е важно умение.
Using basic text editing programs is an important skill.
In this sentence, 'основен' is used to denote an essential or leading role.
Той има основна роля в този проект като ръководител.
He has a primary role in this project as a leader.
The word 'основен' is used as 'fundamental' or 'primary', describing a key aspect or feature.