This is the 4906th most frequent Polish word.
perfekcji
"Perfekcji" means "perfection."
The word 'perfekcji' is used in the genitive case to describe the goal or standard being pursued.
Dąży do perfekcji w swojej pracy.
She strives for perfection in her work.
Here, 'perfekcji' indicates the high standard or quality achieved, also in the genitive case.
Jej taniec osiągnął poziom perfekcji.
Her dance has reached the level of perfection.
In this sentence, 'perfekcji' again appears in the genitive case, expressing the object of the strive or admiration.