This is the 11822nd most frequent Polish word.
kousek
The word "kousek" is not Polish; it is Czech. In English, it means "a piece" or "a bit."
The word 'kousek' here signifies a small part or sample of fabric.
Znalazłem kousek materiału w skrzynce.
I found a piece of fabric in the box.
The word 'kousek' here means 'piece' referring to a portion of cake.
Mogę wziąć kousek ciasta?
Can I take a piece of cake?
The word 'kousek' in this context is used metaphorically to mean a small fragment or snippet of something intangible like a conversation.