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

Examples
Este café es mejor que el de ayer.
This coffee is better than yesterday's.
Tengo una idea mejor para el proyecto.
I have a better idea for the project.
La vida en el campo es mucho mejor.
Life in the countryside is much better.
One Form for Masculine & Feminine
'Mejor' is special because it doesn't change for masculine or feminine things. You say 'el coche mejor' (the better car) and 'la casa mejor' (the better house).
Making it Plural
To talk about more than one thing, just add '-es' to the end: 'mejores'. For example, 'Estos libros son mejores' (These books are better).
Saying 'Más Bueno'
Mistake: “Este libro es más bueno que ese.”
Correction: Este libro es mejor que ese. Spanish combines 'más + bueno' (more good) into the single word 'mejor' when comparing quality.
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