This is the 4738th most frequent Russian word.
заинтересован
Interested.
In this sentence, 'заинтересован' is used as a predicate to express the subject's interest in a specific activity or topic.
Я заинтересован в изучении истории.
I am interested in studying history.
Here, 'заинтересован' indicates the subject's inclination or involvement towards participation in an activity or engagement with others.
Он заинтересован в сотрудничестве с новой командой.
He is interested in collaborating with the new team.
In this case, 'заинтересованы' conveys the state of being intrigued or engaged by the subject matter of the lecture.