This is the 2696th most frequent Turkish word.
yılları
"Yılları" means "the years of" in English.
'Yılları' in this sentence is used to indicate 'years,' specifically a range of years, with '90'lı' modifying it to mean 'in the 90s.'
Bu kitap, 90'lı yılları anlatıyor.
This book describes the 90s.
'Yılları' refers to a specific period in life, 'youth,' making it plural and general.
Gençlik yılları, hayatın en güzel zamanlarındandır.
Youth years are among the most beautiful times of life.
'Yılları' pertains to a phase or era related to success, used possessively to indicate 'his success years.'