Doing a little research I discovered these interesting facts about the history of knitting.
The Oxford Unabridged English Dictionary states that the term "to Knit" was added to English in the 1400's.
"Knit" to make (a garment, fabric, etc.) by interlocking loops of one or more yarns either by hand with knitting needles or by machine.
Knitting for Soldiers WWII http://knitting.about.com/gi/dynamic/offsite.htm?zi=1/XJ/Ya&sdn=knitting&cdn=hobbies&tm=34&gps=303_331_583_420&f=10&tt=14&bt=0&bts=0&zu=http%3A//www.historylink.org/essays/output.cfm%3Ffile_id%3D5722
Another definition of knit:
...to join closely and firmly, as members or parts (often fol. by together): The tragedy knitted the family closer together.
Judy M-I-L at 12:09 PM