This is the 16761st most frequent Turkish word.
yılla
"Yılla" is the imperative form of the verb "yıllamak," meaning "to spend/give years" or "to delay for years."
The word 'yıllar' here refers to multiple years and implies a lengthy duration.
Bu proje yıllar sürecek gibi görünüyor.
This project seems like it will last for years.
The word 'yıllar' in 'yıllardır' conveys an ongoing time period spanning years.
Onunla yıllardır tanışırız.
We have known each other for years.
The word 'yılla' is used to mean 'with the year' associating the new year's beginning with planned actions.