This is the 16519th most frequent Polish word.
wieżowcach
"Wieżowcach" means "skyscrapers" (in the locative plural form) in English.
In this sentence, 'wieżowcach' represents the locative plural form of 'wieżowiec', referring to the place (skyscrapers) where people reside.
Ludzie mieszkają w wysokich wieżowcach w centrum miasta.
People live in tall skyscrapers in the city center.
Here, 'wieżowcach' refers again to the locative plural form, describing the location being planned around the skyscrapers.
Architekt planuje przestrzeń pomiędzy wieżowcach a parkiem.
The architect is planning the space between the skyscrapers and the park.
'Wieżowcach' here indicates the locative plural form to specify the venue of the meeting within the skyscrapers.