An opponent or enemy.
A muscle that acts in opposition to another.
A chemical that binds to a receptor but does not produce a physiological response, blocking the action of agonist chemicals.
The main character or force opposing the protagonist in a literary work or drama.
One who antagonizes or stirs.
A companion; a comrade.
One that habitually accompanies or is associated with another; an attendant circumstance.
A person united with another or others in an act, enterprise, or business; a partner.
One of a pair of elements of an integral domain (or a ring) such that the two elements are divisible by each other (or, equivalently, such that each one can be expressed as the product of the other with a unit).
Somebody with whom one works, coworker, colleague.
A member of an institution or society who is granted only partial status or privileges.
To connect or join together; combine.
To join as a partner, ally, or friend.
To endorse.
To join in or form a league, union, or association.
To spend time socially; keep company.
To be associative.
To connect evidentially, or in the mind or imagination.
Joined with another or others and having lower status.
Having partial status or privileges.
Following or accompanying; concomitant.