This is the 4618th most frequent Polish word.
mieszkać
"To live" or "to reside."
In this sentence, 'mieszkać' is used in the present tense, first person, singular, describing a currently ongoing action of residing somewhere.
Mieszkam w Warszawie od pięciu lat.
I have been living in Warsaw for five years.
Here, 'mieszkać' is in the present tense, third person, singular, used to inquire about someone's place of residence.
Czy Maria mieszka w tym budynku?
Does Maria live in this building?
Within this sentence, 'mieszkać' is shown in both the past tense and present tense, first person, singular, contrasting a prior living situation to the current one.