This is the 971st most frequent Bulgarian word.
сериозен
Serious.
In this sentence, "сериозен" is used to describe a person's dedication and professional attitude, providing emphasis on their commitment to their field.
Той е сериозен учен.
He is a serious scientist.
Here, "сериозен" emphasizes the importance or gravity of the issue mentioned, indicating that it requires significant attention or concern.
Имаме сериозен проблем.
We have a serious problem.
In this example, "сериозна" describes someone's outward demeanor, showing that they seem reserved or composed, but it contrasts with their underlying character.