speed
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speed
The speed at which an object, a person, or a vehicle moves. It indicates what distance is covered in a certain amount of time.
In dieser Zone beträgt die erlaubte Höchstgeschwindigkeit 30 km/h.
In this zone, the permitted maximum speed is 30 km/h.
The noun 'Geschwindigkeit' (speed) is derived from the adjective 'geschwind', which means 'schnell' (fast). The ending '-keit' is a typical ending used to form nouns from adjectives.
Der Läufer war für seine Schnelligkeit und Geschwindkeit bekannt.
The runner was known for his quickness and speed.
In the context of movement, 'Geschwindigkeit' (speed) is often combined with verbs such as 'erhöhen' (to increase), 'reduzieren' (to reduce), 'drosseln' (to slow down), or 'messen' (to measure). The phrase 'mit einer Geschwindigkeit von ...' (at a speed of ...) is also very common.
Der Fahrer musste seine Geschwindigkeit stark reduzieren.
The driver had to reduce his speed significantly.
When referring to processes, 'Geschwindigkeit' (speed) is often used with adjectives such as 'atemberaubend' (breathtaking), 'rasant' (rapid), or 'beeindruckend' (impressive). It then describes the dynamics of a development.
Die Firma wächst mit rasanter Geschwindigkeit.
The company is growing at rapid speed.
trip / ride
'die Fahrt' and 'die Geschwindigkeit' can both have to do with movement. In everyday language, 'Fahrt' usually means a trip, journey, or movement by vehicle, for example by car or train. 'Geschwindigkeit', on the other hand, means how fast something moves. The words can be confused because 'Fahrt' is also connected with speed in some contexts. Still, 'Geschwindigkeit' is more precise when you are talking about fast or slow. 'Fahrt' fits better when the route, the journey, or the act of traveling by vehicle itself is meant.
Der Fahrer muss die Geschwindigkeit verringern, weil die Straße nass ist.
The driver has to reduce the speed because the road is wet.
Auf der Fahrt nach Berlin lese ich ein Buch.
On the trip to Berlin, I read a book.