This is the 16111th most frequent Polish word.
uczestnika
"Uczestnika" means "participant" in English.
Here, 'uczestnika' is the genitive singular of 'uczestnik,' meaning 'participant,' indicating possession or relation to the impressions.
Rozmawialiśmy o wrażeniach każdego uczestnika konferencji.
We talked about the impressions of each participant of the conference.
In this sentence, 'uczestnika' (genitive singular) signifies the participant related to today's meeting, focusing on a specific relational point.
Nie widziałam jeszcze uczestnika dzisiejszego spotkania.
I haven't seen today's meeting's participant yet.
The word 'uczestnika,' in the accusative singular, points to the direct object receiving the appreciation for active participation.