This is the 10482nd most frequent Polish word.
cz艂onek
The Polish word "członek" means "member" (e.g., of a group or organization) or "limb" (of the body).
In this sentence, 'członkiem' means 'member' in the context of being a part of a group or organization.
Jan jest członkiem naszej drużyny.
Jan is a member of our team.
Here, 'członek' refers to an individual who has joined a specific club or association.
Nowy członek klubu był bardzo miły.
The new club member was very kind.
In this example, 'członki' is used metaphorically to describe branches of a tree, similar to 'limbs' in English.