Another etymology

I love etymologies, especially when I can connect otherwise ordinary English words with each other or with a Greek word. Today's example:

The Greek word "kachazo" is the same as the English word "cackle". One of the variants of the Greek word is "kagchalao", which is where the "l" in "cackle" can be seen.

But there's another English word which is also from the same root: "laugh".

The root in Proto-Indo-European is apparently "klak-", and in Greek the "l" dropped off to make "kak-" > "kach-", while in English the first "k" dropped off to make "lak-" > "lach-" > "lagh-" > "laugh".

I love etymologies. :-)