Tom tökezledi ve düştü.
- Tom stumbled and fell.
At tökezleyip şovalyeyi düşürmüş olmalı.
- The horse must have stumbled and have toppled the knight.
I always stumble over verbs in Spanish.
He stumbled over a rock.
... When you pick up a newspaper, you often stumble across lots ...
... has never been easy sometimes we stumble ...