Learn how to say Gunner correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word gunner:
1a serviceman who operates or specializes in guns, in particular:
(in the British army) an artillery soldier (used especially as an official term for a private).
a member of an aircraft crew who operates a gun, especially (formerly) in a gun turret on a bomber.
historical a naval warrant officer in charge of a ship’s guns, gun crews, and ordnance stores.
2a person who hunts game with a gun.