Department, Club, Category
suffix
You'll see this attached to other words... like "sales" or "tennis." When you see this, you'll know it is a ___ department, or a ___ club, making this word mean department or club, similar to the kanji meaning.
ぶ
The reading is the on'yomi reading. Don't type the 〜 out when writing the answer. It's just there to let you know that there's usually something attached to this word.
中学の時は、バレーボール部でした。
I belonged to a volleyball club back in junior high school.
あそこの会社のデジタルソリューション部に入ったばかりなんです。
I just joined the digital solution department at the company.
経理部の部長をしています。
I’m the head of the accounting department.