noun / verb
mate
MAYT/meɪt/
A companion sharing an undertaking or relationship.
My hiking mate and I share a snack on the trail.

Etymology
A mate was originally someone sharing a table: companionship was pictured through eating together. The word broadened to a companion or partner, including a spouse or one of an animal pair.
In context
It's the mating season, and this male's three-foot longtail feathers have helped him successfully attract a mate. Now he has a young family to feed.
More examples
- The robin brings food to its mate.
- The ship's first mate checks the cargo.
- These birds mate in the spring.
Forms
mate · mates · mated · mating
teammate noun — Someone who belongs to the same team.