This is the 4440th most frequent Polish word.
kajaki
"Kayaks."
In this sentence, 'kajaki' implies engaging in the activity of kayaking.
W weekend wybieramy się na kajaki.
We are going kayaking this weekend.
Here, 'kajaki' refers to the physical boats used for kayaking.
Zauważyłem piękne kajaki przy brzegu jeziora.
I noticed beautiful kayaks by the lake shore.
In this case, 'kajaki' refers to the concept or activity of kayaking in general.