This is the 4463rd most frequent Polish word.
kimś
The Polish word "kimś" means "someone" or "somebody" in instrumental case.
Used in the context of aspiring to become significant or notable.
On chce być kimś w przyszłości.
He wants to be somebody in the future.
Used to refer to an unspecified person with expertise.
Musisz rozmawiać z kimś, kto zna się na tym.
You need to talk to someone who knows about this.
Used to indicate presence with an unspecified individual.