This is the 3561st most frequent Polish word.
biurowiec
Office building.
Here 'biurowiec' refers to a specific, newly built structure designated for office use.
Biurowiec został niedawno wybudowany w centrum miasta.
The office building was recently constructed in the city center.
In this case, 'biurowiec' denotes an existing structure that underwent improvements.
Modernizacja tego biurowca poprawiła warunki pracy dla wszystkich pracowników.
The renovation of this office building improved working conditions for all employees.
Here, 'biurowców' (plural form of 'biurowiec') is used to imply multiple office buildings in a general context.