Grape (the fruit) or grapevine. Eaten fresh, used for juice or as the raw material for wine. Usually written in kana.
甘いぶどうをたくさん買ってきた。
I bought a lot of sweet grapes.
ぶどうジュースを冷やして飲んだ。
I chilled and drank grape juice.
ワインは主にぶどうから作られる。
Wine is mainly made from grapes.