This is the 14678th most frequent Polish word.
prądem
"Prądem" means "with electricity" or "by current."
The word 'prądem' refers to the flow or stream of the river in this context.
Ryba płynie z prądem rzeki.
The fish swims with the river's current.
Here, 'prądem' refers to electrical current capable of delivering a shock.
Ostrożnie, kabel pod napięciem może razić prądem.
Careful, a live wire can shock with electricity.
In this example, 'prądem' is used metaphorically to describe the flow or movement of air in a stream-like manner.