This is the 3650th most frequent Polish word.
gość
"Guest."
The word 'gość' is used to mean 'a guest' or a visitor in this context.
Mamy gościa w domu.
We have a guest at home.
Here, 'gość' is colloquially used to mean 'a guy' or 'a fellow' when referring to someone informally.
Ten gość wygląda na zmęczonego.
This guy looks tired.
In this sentence, 'gość' is figuratively used to denote someone who partakes in or contributes to an event, like a conversation.