This is the 6541st most frequent Polish word.
czeszkami
"Czeszkami" is the instrumental plural form of "Czeszka," meaning "Czech women."
Here, 'czeszkami' is the instrumental plural form of 'Czeszka', which refers to women from the Czech Republic.
W parku rozmawiałem z czeszkami.
In the park, I talked with Czech women.
In this usage, 'czeszkami' describes the attribute of the students, emphasizing their nationality as Czech.
W tej klasie są dwie uczennice będące czeszkami.
In this class, there are two students who are Czech women.
In this case, 'czeszkami' refers to the co-participants of games being Czech women, using the instrumental plural form.