Breakdown of Non si sono voluti giustificare per un'accusa infondata.
essere
to be
una
a / an (feminine)
non
not
per
for / in order to / because of
Questions & Answers about Non si sono voluti giustificare per un'accusa infondata.
Why is the auxiliary sono used here instead of hanno for the verb volere?
Why is it voluti and not voluto?
Could I put the si at the end of giustificare instead?
Yes, you can attach it to the infinitive to make giustificarsi. But if you do that, the modal verb keeps its normal auxiliary (avere) and the past participle doesn't change its ending. The sentence would become: Non hanno voluto giustificarsi per un'accusa infondata. Both versions are correct and mean the exact same thing.
Just as a refresher, why does un'accusa have an apostrophe?