This is the 5535th most frequent Polish word.
uczestnikami
Participants.
Here, 'uczestnikami' means 'participants' in the instrumental case plural, referring to individuals attending the conference.
Spotkałem się z uczestnikami konferencji, aby omówić plan.
I met with the participants of the conference to discuss the plan.
In this sentence, 'uczestnikami' refers to the direct contributors, implying their influential presence in the workshops.
Warsztaty były bardzo interesujące dzięki zaangażowaniu uczestnikami.
The workshops were very interesting due to the involvement of the participants.
'Referencing 'uczestnikami' denotes the people included in the trip activity, specifically individuals interacted with while having lunch.