This is the 6032nd most frequent Spanish word.
abuelo
Grandfather.
In this sentence, 'abuelo' is used to refer to the speaker's grandfather.
Mi abuelo siempre cuenta historias interesantes.
My grandfather always tells interesting stories.
Here, 'abuelo' is used to denote the grandfather of the speaker's friend, indicating possession through the genitive structure 'de mi amigo'.
El abuelo de mi amigo es muy amable.
My friend's grandfather is very kind.
In this context, 'abuelos' is the plural form of 'abuelo', simultaneously indicating both grandparents.