der Bordstein
curb
The raised edge made of stone or concrete that separates the sidewalk from the roadway.
Pass auf, dass du mit dem Reifen nicht gegen den Bordstein fährst.
Be careful not to drive the tire against the curb.

curb
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curb
The raised edge made of stone or concrete that separates the sidewalk from the roadway.
Pass auf, dass du mit dem Reifen nicht gegen den Bordstein fährst.
Be careful not to drive the tire against the curb.

The word 'Bordstein' (curb) is made up of 'Bord' (edge, border) and 'Stein' (stone). So it literally describes the stone that forms an edge.
Der Bordstein trennt den Gehweg von der Straße.
The curb separates the sidewalk from the street.
Pay attention to the preposition and case: you drive 'gegen den Bordstein' (against the curb; accusative), park 'am Bordstein' (at the curb; dative), or step down 'vom Bordstein' (from the curb; dative).
Vorsicht, fahr nicht zu nah an den Bordstein!
Careful, don't drive too close to the curb!
Common combinations are 'ein hoher/niedriger Bordstein' (a high/low curb) or 'ein abgesenkter Bordstein' (a lowered curb) for wheelchairs and strollers. A typical verb is 'stolpern über' (to trip over).
An der Kreuzung gibt es einen abgesenkten Bordstein für Kinderwagen.
At the intersection, there is a lowered curb for strollers.
sidewalk
'der Gehweg' and 'der Bordstein' both belong to the street, but they do not mean the same thing. The Gehweg is the area where pedestrians walk. The Bordstein is only the raised edge between the sidewalk and the roadway. Learners may confuse the words because they are right next to each other. If you mean where people walk, you say 'Gehweg'. If you mean the edge that you can step over or where a car stops, you say 'Bordstein'.

Das Kind setzt sich auf den Bordstein und wartet auf seine Mutter.
The child sits down on the curb and waits for his mother.
Nach dem Regen ist der Gehweg vor dem Haus sehr glatt.
After the rain, the sidewalk in front of the house is very slippery.