Skwill

The merging of skill and will.

A high degree of both technical ability and will to succeed.

When someone uses their will power and self discipline to devote themselves to practicing an art, they can develop a deeply rooted skill set. They are then able to depend on these skills as "second nature" or reflex reaction, which is faster than thinking.

"Did you see that MMA fighter? He's got mad skwill!

"Oh man, you got skwilled son!"
"You don't get that kind of skwill overnight."