This is the 3817th most frequent Polish word.
one
The Polish word "one" means "they" (referring to a group of feminine or non-masculine entities).
The word "one" in this sentence refers to a group of females (third person plural feminine pronoun).
One są bardzo miłe.
They are very kind.
Here, "one" means "them." It is used as a masculine/neuter accusative pronoun referring to objects.
Mam one w mojej szufladzie.
I have them in my drawer.
In this case, "one" again refers to a group of individuals or objects, emphasizing the presence of them (feminine plural).