Usage patterns
包丁で〈物〉を切るto cut something with a kitchen knife
I cut the vegetables with a kitchen knife.
包丁を研ぐto sharpen a kitchen knife
I sharpen my kitchen knife every week.
包丁を握るto wield a kitchen knife (i.e., to cook)
He wields a knife at the restaurant every day.
包丁を入れるto make the first cut into something with a kitchen knife
I made the first cut into the cake with a knife.