The lack of communication was a stumbling-block in their relationship.

There are many stumbling blocks on the path to success.

I tripped over the stumbling-stones in the garden.

The lack of experience can be a stumbling stone in achieving success.

I was stumbling across old photos when I found a picture of my grandparents.

There are many stumbling-blocks on the path to success.

The stumbling-stone in the garden caused me to trip and fall.

He was stumbling against the furniture in the dark.

I saw the stumbling stones in the memorial park.

The stumbler tripped over a rock and fell.