Baja del bordillo con cuidado, que viene una bicicleta.

Step down from the curb carefully, a bicycle is coming.

Breakdown of Baja del bordillo con cuidado, que viene una bicicleta.

• una: a
• con: with
• la bicicleta: the bicycle
• el cuidado: the care

Questions & Answers about Baja del bordillo con cuidado, que viene una bicicleta.

Why is it baja and not bajas or baje?

Baja is the tú affirmative command of bajar.

• tú hablas → normal statement: you go down
• ¡Baja! → command: Get down! / Step down!

Compare:

• bajas = you go down / you are going down (statement)
• baja = go down! (command to tú)
• baje = command to usted (more formal)

So this sentence is speaking informally to one person.

Why is it del bordillo?

Del is just the contraction of de + el.

• de el bordillo → del bordillo

Here, bajar de means to go down from / step down from something.

So:

• bajar del bordillo = to step down from the curb

This contraction is mandatory with de + el (except when el is part of a proper name).

What exactly does bordillo mean?