ASSOCIATE

noun

1. A person united with another or others in an act, enterprise, or business; a partner.
2. Somebody with whom one works, coworker, colleague.
3. A companion; a comrade.

verb

1. To join in or form a league, union, or association.
2. To spend time socially; keep company.
3. (with with) To join as a partner, ally, or friend.

adjective

1. Joined with another or others and having lower status.
2. Having partial status or privileges.
3. Following or accompanying; concomitant.