The base of the foot should step upon the ground.

I stepped upon my rock, calling to him by name.

Men and animals were forced to step with care, eyes upon the path.

It was like trying to make himself step naked out upon a busy street.

There was no give when he stepped upon the trap.

Setting her teeth, she stepped upon it and stood there.

Without further question, he stepped upon the path this stranger had created.

As she stepped upon the island, the divine birth began.

Be so good as to step upon this stage.

He turned it in the coals and stepped upon something.