This is the 13788th most frequent Polish word.
pogorszeniu
"Deterioration" or "worsening."
The word 'pogorszeniu' here refers to the act of worsening or getting worse, indicating a decline in physical condition.
Kondycja fizyczna zawodnika uległa pogorszeniu po intensywnym treningu.
The athlete's physical condition worsened after intense training.
In this sentence, 'pogorszeniu' means a deterioration or worsening of the atmosphere in the workplace.
Zauważono pogorszeniu atmosfery w pracy po zmianie kierownictwa.
A worsening of the workplace atmosphere was noticed after management changes.
Here, 'pogorszeniu' describes the worsening or decline in relations between countries.