This is the 11337th most frequent Polish word.
ideału
"Ideału" means "of the ideal" or "of the perfection."
In this sentence, 'ideału' refers to an ideal state or goal someone aspires to achieve, functioning as a noun in the genitive case.
Każdy marzy o osiągnięciu swojego ideału.
Everyone dreams of achieving their ideal.
Here, 'ideału' signifies the concept of perfection or the highest attainable standard, used again as a noun in the genitive case to denote striving or aiming.
On dąży do ideału w każdej dziedzinie swojego życia.
He strives for perfection in every area of his life.
In this case, 'ideału' describes an exemplary or perfect version within the context of evaluating the painting, indicating the noun in its genitive form.