This is the 1682nd most frequent Japanese word.
部員
Member of a club or group.
In this sentence, "部員" is used to describe a person who is a member of a specific club or group, emphasizing their participatory role in that context.
彼はサッカー部の部員です。
He is a member of the soccer club.
Here, "部員" is utilized to refer to new additions or individuals who recently joined a club or organization, focusing on the aspect of admission or incorporation.
新しい部員が5人入部しました。
Five new members joined the club.
In this case, "部員" refers to all the existing members of a club collectively, emphasizing the internal dynamics or interactions within the group.