How to Say "it runs" in Spanish
The Spanish word for “it runs” is “funciona” — A1 level. This is a very common word in everyday Spanish.

Examples
Mi teléfono no funciona.
My phone doesn't work.
¿Funciona el aire acondicionado?
Does the air conditioning work?
El sistema funciona perfectamente.
The system works perfectly.
Who is 'funciona' talking about?
'Funciona' most often means 'it works' for a single thing (el teléfono funciona). But it's also the verb form for 'he works,' 'she works,' and the formal 'you work' (usted funciona). The conversation will tell you if it's a person or a thing.
Making it plural
If you're talking about more than one thing, just add an 'n' at the end: 'Las luces no funcionan' (The lights don't work).
Using 'trabajar' for machines
Mistake: “Mi computadora no trabaja.”
Correction: Mi computadora no funciona. Use 'trabajar' for people who have a job, and 'funcionar' for machines and devices that work.
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