How to Say "dress up" in Spanish
The Spanish word for “dress up” is “arreglar” — B1 level. This is a very common word in everyday Spanish.
English → SpanishB1
VerbB1
to smarten oneself up or put on makeup/nice clothes

Examples
¿Cuánto tiempo necesitas para arreglarte antes de la cena?
How much time do you need to get ready before dinner?
Me arreglé mucho para la boda de mi prima.
I dressed up a lot for my cousin's wedding.
The Power of 'Se'
When 'arreglar' has the little word 'se' attached (arreglarse), it becomes a reflexive verb, meaning the person is doing the action to themselves, like 'getting oneself ready' or 'fixing oneself up.'
Fixing vs. Getting Ready
Mistake: “Using 'Yo arreglo' when you mean 'I am getting ready.'”
Correction: Use 'Me arreglo' (I get myself ready). 'Yo arreglo' means 'I fix (something else).'
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