This is the 4384th most frequent Japanese word.
同僚
Colleague.
Here, "同僚" is used to refer to people who work with the speaker in the workplace, emphasizing companionship.
昨日、同僚と一緒に飲みに行きました。
Yesterday, I went out for drinks with my colleagues.
In this context, "同僚" indicates a fellow worker involved in the professional setting and the specific discussion regarding work.
新しいプロジェクトについて、同僚と話しました。
I discussed the new project with my coworker.
Here, "同僚" denotes a colleague at the workplace, with an emphasis on the personal relationship being closer than general acquaintances.