"外公"在英语中读作 "grandfather"。它来自古英语中 "grān fæder" 的组合， "grān" 意为 "great"，"fæder" 意为 "father"。
例句：
My grandfather is a retired teacher. (我的外公是一名退休的教师。)
He always has a kind word for his grandchildren. (他总是对他的孙子孙女说好话。)
My grandfather taught me how to play chess. (我外公教我如何下棋。)