How to Say "functions" in Spanish
The most common Spanish word for “functions” is “funcione” — use this word when referring to the proper operation or correct working of a system, machine, or process, often in a formal context or when expressing necessity..
funcione
foo-see-OH-neh (Spain) / foo-nsee-OH-neh (Latin America)/funˈθjo.ne/ (Spain) /funˈsjo.ne/ (Latin America)

Examples
Es necesario que el sistema funcione correctamente.
It is necessary that the system works correctly.
Dudo que esta batería funcione bien en el frío.
I doubt that this battery works well in the cold.
¡Que funcione la cafetera!
I hope the coffee machine works!
The Subjunctive Mood
This 'funcione' form is used when the verb expresses uncertainty, emotion, desire, or necessity. English often uses 'that it works' or 'for it to work'.
Formal Command
When giving a polite, formal command to one person ('usted'), 'funcione' is the affirmative command: '¡Funcione ahora!' (Work now!).
Mixing Indicative and Subjunctive
Mistake: “Pienso que el programa funciona.”
Correction: Pienso que el programa funcione. (If you express doubt or desire, you need the 'funcione' form.)
actúa
Examples
El presidente actúa con mucha cautela en esta crisis.
The president acts with great caution in this crisis.
responde
rreh-SPOHN-deh/resˈpon.de/

Examples
El coche responde muy bien al acelerar en la autopista.
The car responds very well when accelerating on the highway.
El paciente no responde a los medicamentos.
The patient is not reacting to the medications.
Responding to Stimuli
When talking about how a non-human thing (like a medicine, machine, or environment) handles a situation, 'responde' means it reacts or performs in a certain way.
Function vs. Operation vs. Response
Related Translations
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