Med en kniv.
En stor kniv.
En stor skarp kniv.
What is the difference between å skjære and å klippe?
It depends on what tool you're using. You can 'klippe' with scissors or some machines(lawn mowers, hedge trimmers), but not with a knife, which you'd use to cut meat. So in this case you would use 'skjære'.
I understand skjær as "shear" like the engineering shear forces. Klipp is clip in english.
I'm not entirely sure if that's a good way of understanding the difference between skjære/klippe...
I think "clip" is more like "cut" done with scissors.
Whereas "cut" is more like "slice" (a knife can cut, slice, or carve; scissors can only cut)