precursor
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precursor
An earlier, often simpler version of something that was later developed further; a predecessor.
Das Telegramm kann als ein Vorläufer der E-Mail betrachtet werden.
The telegram can be considered a precursor of email.
'Vorläufer' consists of 'vor' (before/ahead) and a form of the verb 'laufen' (to run/walk). So it literally describes something or someone that 'runs ahead' or precedes a development.
Das Laufrad war ein Vorläufer des heutigen Fahrrads.
The balance bike was a precursor of today's bicycle.
To say what something is a precursor of, German usually uses the preposition 'von' followed by the dative, or the genitive.
Diese einfachen Rechenmaschinen gelten als Vorläufer von modernen Computern.
These simple calculating machines are considered precursors of modern computers.
In the meaning of 'Anzeichen' (sign), 'Vorläufer' often refers to natural phenomena or abstract developments that point to a larger event.
Die ersten Proteste waren nur die Vorläufer einer landesweiten Bewegung.
The first protests were only the forerunners of a nationwide movement.
successor
'der Nachfolger' and 'der Vorläufer' are opposites in terms of time. A 'Nachfolger' comes later and replaces or follows an earlier version. A 'Vorläufer' comes earlier and is often a simpler or first form of something that was later developed further. The words can be confused because both appear when comparing old and new models, ideas, or developments. The direction is crucial: the 'Vorläufer' comes before the later development; the 'Nachfolger' comes after it.
Dieses einfache Gerät gilt als Vorläufer des modernen Smartphones.
This simple device is considered a precursor of the modern smartphone.
Der Nachfolger des alten Programms ist schneller und einfacher zu bedienen.
The successor to the old program is faster and easier to use.