This is the 11673rd most frequent Polish word.
koleżankami
"Friends" or "female colleagues" (instrumental case, plural, feminine).
"Koleżankami" is in the instrumental case, indicating accompaniment while spending time.
Lubię spędzać czas z koleżankami podczas wakacji.
I like spending time with my female friends during holidays.
Here, "koleżankami" is again in the instrumental case, referring to the individuals accompanying for coffee.
Czy mogę pójść na kawę z koleżankami po zajęciach?
Can I go for coffee with my female friends after classes?
The word "koleżankami" here is used in the instrumental case, showing with whom the speaker talked.