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Very few people hold a knife properly (for food preparation) I truly cringe when seeing someone holding a knife in the 'back'
Scary & zero control!
Choke way up on the knife, hold it w/ your thumb & index finger on the blade itself. The rest of your hand follows to grip.
Decent knives have handles that all but show you how to grasp it by its shape.
Again, choke way up on it, this will give control.
also: there are dozens of kitchen knives, use the right tool for the job....
8" chef knife will do the most