stumble

He stumbled over the uneven ground, barely catching himself before falling.他在凹凸不平的地面上绊了一下，险些摔倒，好不容易稳住了身形。

As she ran through the forest, she stumbled upon an old, hidden path.当她在森林里奔跑时，无意中发现了一条古老而隐蔽的小路。