adverb/ˌpaɾa ˌmas ˈinri/
to add insult to injury, to make matters worse, on top of that
“Lástima que la justicia sea tan lenta, dando lugar a que se olviden tantos delitos y, para más inri, oír a muchos abogados defender a veces lo indefendible, provocando la indignación de las personas honradas.” — It's such a pity that justice is so slow, giving rise to many crimes being forgotten, and, to make matters worse, hearing many lawyers sometimes defending what is indefensible, provoking the indignation of honest people.
Synonyms: encima, para mayor inri, más encima, como si fuera poco, para colmo
From Latin INRI, the message written on the cross during the crucifixion of Jesus.