Stumbled

The kid stumbled and fell to his knees.

In early times, inventions were often stumbled upon by accident.

The stout man leaped over the shallow ditch and stumbled.

Yesterday I stumbled across a copy of my father's family register.

The little girl stumbled up the stairs.

I stumbled upon awesome stuff.

She stumbled over a wheelbarrow.

I stumbled on a stone.

I stumbled across this problem when I was working on something else.

Tom stumbled backwards.