This is the 17865th most frequent Polish word.
łańcuch
Chain.
In this sentence, 'łańcuch' refers to the physical chain used in the mechanism of a bicycle.
Mój rower ma mocny łańcuch wykonany ze stali.
My bicycle has a strong chain made of steel.
Here, 'łańcuch' is used metaphorically to represent a sequence or series of events or actions.
Jego łańcuch działań doprowadził do sukcesu.
His chain of actions led to success.
In this case, 'łańcuch' again represents a physical chain, specifically one used for securing or decoration purposes.