This is the 273rd most frequent Bulgarian word.
участие
Participation.
In this sentence, 'участие' is used as a noun meaning 'participation' or 'involvement', referring to someone's active role in an activity or event.
Неговото участие в проекта беше решаващо.
His participation in the project was crucial.
Here, 'участие' again functions as a noun, signifying the act of 'taking part' or 'joining' in a competition or contest.
Тя изрази желание да вземе участие в конкуренцията.
She expressed a desire to take part in the competition.
In this context, 'участие' emphasizes the necessity of someone's contribution or presence for the success of a collaborative effort.