This is the 5511th most frequent Polish word.
trzydzieści
"Trzydzieści" means "thirty" in English.
The word "trzydzieści" represents the age of a person in years.
Mam trzydzieści lat.
I am thirty years old.
Here, "trzydzieści" indicates the number of chairs present in the room.
W pokoju jest trzydzieści krzeseł.
There are thirty chairs in the room.
In this case, "trzydzieści" quantifies the number of events occurring within a specified time frame.