Where does “grandíssim” come from?

grandíssim (Catalan) comes from Catalan -íssim, from Latin -issimus, from Proto-Italic *-isəmos — forms superlative forms of adjectives.

Ancestry of “grandíssim”, step by step

StepLanguageWordMeaning
1Catalan-íssimAdded to adjectives to form the absolute...
2Latin-issimusadded to an adjective noun to form its...
3Proto-Italic*-isəmosforms superlative forms of adjectives
Every word from Proto-Italic *-isəmos →Every word from Latin -issimus →Every word from Catalan -íssim →