しゅうし終始shuushi
1.
The quality of maintaining a consistent state or attitude from the beginning to the end of a situation, without any changes throughout.
2.
A condition in which a person or entity holds onto their original stance or behavior throughout the entire duration of an event or discussion, exhibiting unwavering commitment.
3.
A continuous manner of behavior or approach that remains unchanged and steadfast from the start to the conclusion of an occurrence.
Example:
前の会社では何でも屋に終始したので今度は専門職に就きたい。