This is the 24th most frequent Dutch word.
kan
"Kan" in Dutch means "can" (ability) or "jug/pitcher" (container).
In this sentence, 'kan' indicates the ability to do something, which is to speak Dutch.
Ik kan Nederlands spreken.
I can speak Dutch.
In this example, 'kan' expresses a possibility or probability of an event occurring, which is raining tomorrow.
Het kan morgen regenen.
It might rain tomorrow.
Here, 'kun' (a conjugation of 'kan') is used to express a polite request for assistance or action.