teammate
n. countable A2 Elementary US //ˈtiˌmeɪt// UK //tˈiːmeɪt// team·mate
n. someone who is on the same team as you. You use this word to talk about people you play sports with or work with on a project.
n. a fellow member of a team, especially in a sporting or professional context.
She is a supportive teammate who always helps others.
After the game, every teammate gathered in the locker room to celebrate their hard-earned victory.
While individual talent is necessary for success, the ability to communicate effectively with every teammate is what ultimately secures a championship title.