This is the 106th most frequent Turkish word.
eski
"Eski" means "old" in English.
'Eski' in this sentence describes a long-standing and enduring friendship.
Eski dostlar buluştu.
Old friends met.
Here, 'eski' is used in a context of nostalgia, referring to times past.
Eski günlere özlem duyuyorum.
I long for the old days.
Here, 'eski' is used as an adjective to describe the age of the book.