How to Say "justification" in Spanish
The Spanish word for “justification” is “excusa” — A1 level. This is a very common word in everyday Spanish.
English → SpanishA1
nounA1
a valid reason

Examples
Su excusa para no venir fue que su perro estaba enfermo.
His excuse for not coming was that his dog was sick.
No tengo ninguna buena excusa para mi error.
I don't have any good excuse for my mistake.
Usó el tráfico como excusa para llegar tarde a la reunión.
He used the traffic as a pretext for arriving late to the meeting.
Gender Check
Remember that 'excusa' is always a feminine word, so you must use 'la' or 'una' with it: 'una excusa ridícula'.
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