This is the 5445th most frequent Polish word.
sztuczny
Artificial.
Here, "sztuczny" means "artificial" and refers to flowers made not from natural materials, but fabricated ones, often plastic.
On kupił sztuczne kwiaty do dekoracji.
He bought artificial flowers for decoration.
"Sztuczny" conveys "artificial" as describing air quality that lacks natural freshness, e.g., air-conditioned or synthesized air.
Zapach sztucznego powietrza w tym pomieszczeniu był nieprzyjemny.
The smell of artificial air in this room was unpleasant.
Here, "sztuczna" is used in the context of "artificial intelligence," referring to systems created by humans to simulate natural intelligent behavior.