gratuito
/ɡɾaˈtwito/ · B2 · adj
free, free of charge, gratis
🎁 gratuito ≈ gratis + -ito: Latin gratuitus, given as a favor (gratia)
From Latin gratuitus, from gratia meaning favor or thanks. Something done as a favor costs nothing, so it is free. The same idea of having no basis or reason gives the sense of unwarranted, as in a gratuitous insult.