-ísimo

Borrowed from Latin -issimus, and partly based on the model of Italian -issimo.

• IPA^(key): /ˈisimo/ [ˈi.si.mo]
• Rhymes: -isimo
• Syllabification: -í‧si‧mo

-ísimo (feminine -ísima, masculine plural -ísimos, feminine plural -ísimas) (adjective)
-ísimo (adverb)

1. Added to adjectives to form the absolute superlative.

   ‎mismo (“same”) + ‎-ísimo → ‎mismísimo (“very same”)

2. Added to adverbs to form the superlative.

   ‎lejos (“far”) + ‎-ísimo → ‎lejísimo (“very far”)

   ‎tarde (“late”) + ‎-ísimo → ‎tardísimo (“very late”)

• “-ísimo”, in Diccionario de la lengua española, Vigésima tercera edición, Real Academia Española, 2014