てっ徹teするsuru
1.
To reach deeply into a particular aspect, often to the point of being profoundly affected or influenced by it, such as when an emotion or condition pervades one's being.
2.
To maintain a consistent stance or approach with unwavering commitment throughout a process, whether it be a belief, attitude, or role one plays, demonstrating thorough dedication.
3.
To engage in an activity continuously throughout a specified period without pause, emphasizing an intensity of effort or focus that lasts from the beginning to the end of that time.
Example:
大学出たての新人は資料を作ったり、コピーをとったりと裏方仕事に徹するのだろうと、勝手に想像していたのですが見事に裏切られました。