This is the 1548th most frequent Polish word.
członkiem
The Polish word "członkiem" means "member" (in the instrumental case).
Here, "członkiem" refers to an individual belonging to or being part of a group or organization like a sports club.
Jestem członkiem tego klubu sportowego.
I am a member of this sports club.
In this sentence, "członkiem" denotes being a participant or a member of a professional group.
Byłem członkiem zespołu projektowego w mojej firmie.
I was a member of the project team in my company.
Here, "członkiem" represents an individual who is a member of a familial group, describing their role within the family.