
der Großvater
grandfather
The father of one's own father or mother.
Mein Großvater erzählt mir oft Geschichten aus seiner Jugend.
My grandfather often tells me stories from his youth.
grandfather
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grandfather
The father of one's own father or mother.
Mein Großvater erzählt mir oft Geschichten aus seiner Jugend.
My grandfather often tells me stories from his youth.
The word is simply made up of 'groß' (big/great) and 'Vater' (father). 'Groß-' is used here in the sense of 'one generation before,' not in the sense of physical size.
Mein Großvater ist kleiner als mein Vater.
My grandfather is shorter than my father.
In everyday life, and especially when talking with family, the short form 'Opa' (grandpa) is almost always used. 'Großvater' (grandfather) is more formal and is used more in written language.
Am Sonntag besuchen wir Opa und Oma.
On Sunday we are visiting Grandpa and Grandma.
The prefix 'Groß-' refers to your parents' parents' generation. It also works for other family members, for example 'die Großmutter' (grandmother/grandma) and 'die Großeltern' (grandparents; grandma and grandpa together).
Meine Großeltern leben auf dem Land.
My grandparents live in the countryside.
grandpa
„Opa“ and „Großvater“ can both refer to the father of one of a person's parents. „Opa“ sounds familiar and colloquial, while „Großvater“ sounds more neutral or formal. „Opa“ is often appropriate in family conversations, while „Großvater“ is more likely in an official context.

Im Formular trage ich den Geburtsort meines Großvaters ein.
I enter my grandfather's place of birth on the form.
Am Sonntag besuche ich meinen Opa im Nachbardorf.
On Sunday, I am visiting my grandpa in the neighboring village.