1.
If an engine or machine is running ~, it is working smoothly and efficiently.
He heard the car engine running ~ beyond the open door.
ADV: ADV with v
2.
If you kick or hit a ball ~, you kick or hit it in the very middle of it so that it goes firmly and accurately to the place you are aiming for.
He could strike the ball as ~ as when he was 28 years younger.
ADV: ADV with v
3.
see also sweet