From Wiktionary, the free dictionary
alto (“high; tall”) + -ísimo (superlative suffix)
- IPA(key): /alˈtisimo/ [al̪ˈt̪i.si.mo]
- Rhymes: -isimo
- Syllabification: al‧tí‧si‧mo
altísimo (feminine altísima, masculine plural altísimos, feminine plural altísimas)
- superlative degree of alto