This is the 1767th most frequent German word.
kane
"Kane" is not a German word.
In this sentence, 'keine' is used to negate the noun 'Ahnung' (idea), expressing the absence of it.
Ich habe keine Ahnung, was er meint.
I have no idea what he means.
Here, 'keine' negates the plural noun 'Wolken' (clouds), indicating that the sky is clear.
Es gibt keine Wolken am Himmel heute.
There are no clouds in the sky today.
The word 'keine' negates the singular noun 'Zeit' (time), suggesting the lack of leisure time.