yokefellow
/ˈjoʊkˌfɛloʊ/
noun
- A person who works closely with another; a partner or companion, especially in a difficult task.
- The two explorers were yokefellows on the dangerous journey.
- She considered her coworker a true yokefellow in the long project.
- In the old days, a farmer's yokefellow was often his son or a hired hand.