collaborator
US /kəˈlæb.ə.reɪ.t̬ɚ/
UK /kəˈlæb.ə.reɪ.t̬ɚ/
1.
a person who works with another person or group in order to achieve or do something
:
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She is a key collaborator on the research project.
•
The two artists are frequent collaborators.
2.
a person who cooperates traitorously with an enemy
:
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He was accused of being a collaborator during the occupation.
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The government sought to punish all collaborators after the war.