Where does “prontissimo” come from?

prontissimo (Italian) comes from Italian pronto, from Latin prōmptus, from Latin prōmō, from Latin prō, from Latin ratus, from Latin rēōr, from Proto-Italic rēōr, from Proto-Indo-European h₂reh₁- — to fit, to fix, to put together.

Ancestry of “prontissimo”, step by step

StepLanguageWordMeaning
1Italianprontoready, prepared; willing, prompt, set; ready-made
2Latinprōmptusa taking forth
3Latinprōmōto take or bring out or forth, produce, bring to light
4Latinprōfor
5Latinratusconsidered, having been considered; established,...
6Latinrēōrto reckon, calculate
7Proto-Italicrēōrto reckon, to calculate; to think, to deem, to...
8Proto-Indo-Europeanh₂reh₁-to think, reason; to arrange
9Proto-Indo-Europeanh₂er-to fit, to fix, to put together
Every word from Proto-Indo-European h₂er-Every word from Proto-Indo-European h₂reh₁-Every word from Proto-Italic rēōr
prontissimo — Etymology, Origin & Word History | Etymology Explorer