This is the 4738th most frequent Polish word.
niżu
"Niżu" in Polish refers to a "low-pressure area" in meteorology or "lowland" in geography, depending on context.
Here, 'niżu' is used in the context of 'niż demograficzny,' referring to a demographic decline characterized by a decrease in population numbers.
Niżu demograficznego doświadczyło wiele krajów europejskich.
Many European countries have experienced a demographic decline.
In this sentence, 'niż' refers to meteorological 'low-pressure systems' causing specific weather conditions such as rain and cloudy skies.
W atmosferze pojawił się niż, który przyniesie deszczowe dni.
A low-pressure system appeared in the atmosphere, which will bring rainy days.
The word 'niż' in this example is used as part of the comparative description 'na niższym poziomie,' meaning 'lower level,' demonstrating its use in specifying relative degrees of difficulty.