一員|いちいんichiin[0]heiban (flat)

1. nounone person; one member
   君きみはいまやエリート集団しゅうだんの一員いちいんだ。↗

   You are now among the elite.

• SynonymメンバーNeutralLoanword for members or a lineup, common in colloquial speech, as in 「メンバー表」; 「一員」 is typical in set phrases like 「社会の一員」.
• Synonym成員せいいんWrittenWritten/formal prose for members making up a group, viewed as its constituent parts; 「一員」 instead stresses that you yourself are one of those members.
• Related仲間なかまNeutralCompanions or fellows, with a feeling of closeness; it stresses the relationship between people and need not be a formal organization.

Use 「一員」 to stress being one part of a group, as in 「チームの一員」 and 「社会の一員」. For members in everyday speech say 「メンバー」, for close companions 「仲間」, and in written/formal prose 「成員」.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 団体だんたいを構成こうせいする一いち個この成員せいいん。