This is the 14723rd most frequent Polish word.
półtoraroczne
"One-and-a-half-year-old."
Used as an adjective to describe the age of a child.
Półtoraroczne dziecko zaczęło mówić swoje pierwsze słowa.
The one-and-a-half-year-old child started saying its first words.
Used as an adjective to describe the age of the wine.
Zamówiłem półtoraroczne wino do obiadu.
I ordered a one-and-a-half-year-old wine for dinner.
Used as a quantitative descriptor to denote the duration of experience.