Sometimes she stumbled over roots and fallen trees.

She tripped over exposed roots and fell flat on her face.

The footing was treacherous in the dark but she leaped over bushes and roots.

Avoid tripping over rocks and roots by focusing a few feet ahead of you on the trail.

Several times they stumbled over roots or dead branches and fell painfully on the frozen ground.

She and Mother had wandered along dear little paths over gnarled roots.

I picked my way down the little hill to the house where they were staying, nearly stumbling over rocks and roots of trees at every step.

Then the boats were sliding up onto the mud and crunching over submerged roots.

Richard watched the ground so he wouldn't trip over roots.

Frequently he tripped over roots and nearly went sprawling.