"爷爷" 的英文单词是 "grandfather"。
其来源是源自古英语 "grān fæder"，其中 "grān" 意为 "great"，"fæder" 意为 "father"。
例句：
"I have a great relationship with my grandfather." (我和我的爷爷有很好的关系。)
"My grandfather taught me how to fish." (我爷爷教我怎么钓鱼。)
"I'm going to visit my grandfather next week." (我下周要去拜访我的爷爷。)