
stolpern
to stumble
To catch your foot on an obstacle while walking or running and thereby lose your balance or fall.
Im Dunkeln bin ich über eine Teppichkante gestolpert.
In the dark, I stumbled over the edge of a carpet.
to stumble
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to stumble
To catch your foot on an obstacle while walking or running and thereby lose your balance or fall.
Im Dunkeln bin ich über eine Teppichkante gestolpert.
In the dark, I stumbled over the edge of a carpet.

to stumble across
Figuratively, to find or discover something or someone by chance and unexpectedly.
Beim Aufräumen des Kellers bin ich über meine alten Schulhefte gestolpert.
While tidying up the basement, I stumbled across my old school notebooks.

to stumble
To briefly lose the thread while speaking or reading aloud, misspeak, or get stuck on a word.
Der Nachrichtensprecher stolperte kurz über den komplizierten ausländischen Namen.
The newsreader briefly stumbled over the complicated foreign name.
The perfect tense of 'stolpern' (to stumble) is always formed with the auxiliary verb 'sein' (to be), because it describes an uncontrolled movement or a change of state. So it is 'ich bin gestolpert' (I stumbled), not 'ich habe gestolpert'.
Pass auf, ich bin gestern an der gleichen Stelle gestolpert.
Be careful, I stumbled in the same spot yesterday.
In all meanings, 'stolpern' (to stumble) is almost always used with the preposition 'über' (over/across) and the accusative. This structure indicates what you get caught on, what you find by chance, or which word causes difficulty.
Er ist über ein Kabel gestolpert.
He stumbled over a cable.
You can recognize the figurative meaning 'etwas zufällig finden' (to find something by chance) from the context. The object that you 'stolpert' over is not a physical obstacle here, but often a piece of information, an object, or a person that you discover unexpectedly.
Beim Stöbern in der Bibliothek bin ich über ein faszinierendes Buch gestolpert.
While browsing in the library, I stumbled across a fascinating book.
When it comes to speaking, 'stolpern' (to stumble) is often used in phrases like 'über seine eigenen Worte stolpern' (to stumble over one's own words) or 'beim Vorlesen stolpern' (to stumble while reading aloud). It describes a brief interruption or a small mistake in the flow of speech.
Der Redner war nervös und stolperte mehrmals über seine eigenen Worte.
The speaker was nervous and stumbled over his own words several times.
to falter / stall
When speaking, both words can describe a brief disruption. “Stocken” emphasizes a pause or hesitation, for example because of uncertainty; “stolpern,” on the other hand, highlights a slip of the tongue, a difficult word, or losing the thread. What matters, therefore, is the type of interruption.

Beim Vorlesen stolperte Lea über ein schwieriges Wort.
Lea stumbled over a difficult word while reading aloud.
Beim Vorlesen stockte Lea kurz, weil sie plötzlich nervös wurde.
Lea faltered briefly while reading aloud because she suddenly became nervous.