This is the 808th most frequent Persian word.
تیمی
"تیمی" means "team-related" or "team-based" in English.
In this sentence, "تیمی" acts as an adjective describing activities (فعالیتها) as team-related.
فعالیتهای تیمی نیازمند هماهنگی است.
Team-based activities require coordination.
Here, "تیمی" is part of the noun "کار تیمی," indicating work performed in the context of a team.
کار تیمی در پروژههای بزرگ اهمیت زیادی دارد.
Teamwork is very important in large projects.
In this context, "تیمی" describes the play (بازی) as characteristic of or related to teamwork.