Tomodachi (友達) means "friend." It's a common and casual word used to refer to someone you know well and share a friendly relationship with. You can use it for both male and female friends, and for a single friend or a group of friends. Example: 彼女は私の友達です。(Kanojo wa watashi no tomodachi desu.) = She is my friend.

親しい関係の人物を指す一般的な言葉です。例：彼女は私の友達です。