This is the 11585th most frequent Russian word.
дядя
Uncle.
Here, 'дядя' is used as 'uncle' to indicate the speaker's father's or mother's brother.
Мой дядя работает врачом.
My uncle works as a doctor.
In this sentence, 'дядя' is a colloquial term used to refer to a man without implying a familial relationship.
Этот дядя в магазине мне помог.
This man in the store helped me.
Here, 'дядя' is a polite form of address combined with a name, often used for elder male family friends or relatives.