colleague

associate, companion, comrade, colleague, fellow, partner

这些名词均有“同事，伙伴”之意。
associate: 普通用词，侧重指在利害关系上密切相关。
companion: 指陪伴他人的人，即同伴或陪伴。
comrade: 指具有共同的事业、利益关系相一致的人。
colleague: 一般用于对同事的正式称呼，基本上专用在职业关系上。
fellow: 多用复数形式，指一块住、生活或同行共事的人。
partner: 指事业中处于合伙关系的人，或指婚姻、游戏、跳舞中的另一方。

名词 colleague:

1. an associate you work with
   同义词：co-worker, fellow worker, workfellow
2. a person who is member of your class or profession
   同义词：confrere, fellow

1. It was more in sorrow than in anger that he criticized his former colleague.
   他批评以前的同事，并非出於气愤而是为他惋惜。
2. I headed him off quarreling with his colleague.
   我阻止他和他的同事发生争吵。
3. My colleague has broken off the habit of smoking.
   我的同事已经戒掉了吸烟的习惯。
4. David and I are colleagues.
   戴维和我是同事。
5. The Prime Minister's cabinet colleague refused to accept the proposal.
   首相的内阁同僚拒绝接受这个建议。

col.league

n.（名词）
A fellow member of a profession, a staff, or an academic faculty; an associate.See Synonyms at partner
同事：同行、职员或学院教工的同僚之一；同事参见 partner

来源：
French collègue
法语 collègue
from Latin collôga
源自 拉丁语 collôga
com- [com-]
com- [前缀，表.共同.]
lôg3re [to depute] * see leg-
lôg3re [委托] *参见 leg-

【引伸】
col.leagueship.
n.（名词）