How to Say "fail!" in Spanish
The Spanish word for “fail!” is “falla” — A2 level. This is a very common word in everyday Spanish.

Examples
Si la luz roja se enciende, es porque el motor falla.
If the red light comes on, it's because the engine is failing/malfunctioning.
Siempre falla cuando tiene que tomar una decisión difícil.
He always fails when he has to make a difficult decision.
No falla el examen, solo necesita estudiar más.
She is not failing the exam, she just needs to study more. (Note: Often used with 'no')
Tú Command Form
The word 'falla' is also the informal command used when telling one person what to do: '¡Falla!' (Fail!)
Confusing Noun and Verb
Mistake: “Using 'la falla' when you mean 'he/she fails'.”
Correction: The noun 'la falla' means 'the mistake.' The verb form 'falla' means 'he/she/it fails.' Listen for the surrounding words (like 'el' or 'la') to know which one is being used.
Related Translations
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