noun / verb
buddy
BUHD-ee/ˈbʌdi/
A friend or companion, or to pair closely with someone.
The woman walks beside her buddy, sharing a laugh.

Etymology
Buddy’s origin is uncertain: it may be an alteration of brother or come from butty, meaning “companion” or “workmate.” Butty was particularly associated with coal miners.
In context
… after you checked up your own equipment, your buddy will check you off one more time …
More examples
- My old buddy called yesterday.
- The children worked with their reading buddies.
- We buddied together for the long hike.
Forms
buddy · buddies · buddied · buddying