This is the 3596th most frequent Polish word.
daria
"Daria" is a Polish female given name.
Here, 'daria' is used as the conditional form of the verb 'dać' (to give), meaning 'I/she would give'.
Daria książkę, gdyby była w domu.
I would give the book if I were at home.
In this sentence, 'Daria' is a proper noun representing the name of a person.
Daria jest imieniem mojej koleżanki.
Daria is the name of my friend.
Here, 'Daria' is again used as a proper noun, referring to a person's name.