grandfather
/ˈɡɹæn(d)ˌfɑːðə(r)/noun
The father of your mother or father.
Example sentences
- “Every summer we stayed at my grandfather's farm.”
- “My grandfather still walks five miles every morning at age eighty.”
As a verb it is useful legal jargon: to grandfather something in is to exempt it from a new rule because it existed before. A 'grandfather clause' does exactly that.