adjective/infiniˈtesimo/
infinitesimal
Etymology tree Proto-Indo-European *né Proto-Indo-European *n̥- Proto-Italic *n̥- Latin in- Latin fīnītus Latin īnfīnītus Latin -ēsimus New Latin īnfīnītēsimuslbor. Spanish infinitésimo Learned borrowing from New Latin īnfīnītēsimus. By surface analysis, infinito + -ésimo.