一介の

a mere

→ 一介
phrase Rare #33,377
a mere A formal or literary expression used before a person's role or occupation to emphasize that they are just an ordinary or insignificant person. Often used with にすぎない or に過ぎない.
JA: 私は一介の教師にすぎません。
EN: I'm just a mere teacher.

彼は一介のビジネスマンにすぎない

He's nothing more than an ordinary businessman.

彼は一介の詩人に過ぎない

He is nothing more than a mere poet.

一介の学生にすぎないので、私は結婚する余裕がない

I'm just a student, so I can't afford to get married.

彼は一介の事務員にすぎない

He's nothing more than a mere office clerk.