This is the 16762nd most frequent Turkish word.
yıllarımı
"My years" (possessive form referring to one's own years).
In this sentence, 'yıllarımı' indicates the speaker's dedication and the time (years) they allocated in their life for learning the art.
Bu sanatı öğrenmek için yıllarımı verdim.
I gave my years to learn this art.
Here, 'yıllarımı' represents the speaker's lifetime and the effort they perceive as having gone to waste.
Yıllarımı boşuna harcamış gibi hissediyorum.
I feel like I've wasted my years in vain.
In this context, 'yıllarımı' expresses a desire to recover or undo the time (years) that have passed.