5, finger, fist, ?fight

From: Marc Verhaegen
Message: 32655
Date: 2004-05-16

I just read (Science 303:1322, 27.2.04) that the words "five", "fist" and
"finger" have a common origin. Where can I find more about this? Are these
words related to the word "fight"? Thanks for any help.

--Marc