Where does “trimillenario” come from?
trimillenario (Italian) comes from Italian millenario, from Latin millenarius, from Latin mīllēnus, from Latin Mīlle, from Proto-Italic smīɣeslī, from Proto-Indo-European smih₂ǵʰéslih₂.
trimillenario (Italian): trimillennial
Ancestry of “trimillenario”, step by step