This is the 947th most frequent Hungarian word.
csökkenése
"Csökkenése" means "decrease" or "reduction" in English.
Here, "csökkenése" describes the decline or reduction in prices, again functioning as a noun.
Az árak csökkenése a vásárlók számára kedvező hatású.
The decrease in prices has a favorable effect for the buyers.
In this case, "csökkenése" represents the deterioration or diminishing quality of the air. It is used to highlight a negative trend in air quality.
A levegőminőség csökkenése aggasztja a helyi lakosokat.
The deterioration of air quality worries the local residents.
The word "csökkenése" refers to the decline or reduction in the population, used as a noun form of the verb "csökken" (to decrease).