This is the 5199th most frequent Polish word.
pustych
"Empty" (genitive plural form).
Here, 'pustych' means 'empty' and is used to describe promises that are unfulfilled or insincere.
Nie lubię pustych obietnic.
I don't like empty promises.
Here, 'pustych' means 'empty' and is used to describe glasses that contain no liquid.
Poproszę dwie szklanki pustych.
I'll have two empty glasses, please.
Here, 'pustych' means 'empty' and is used to describe boxes that do not contain items.