Where does “civilissimo” come from?

civilissimo (Italian) comes from Italian civile, from Latin cīvīlis, from Latin -ilis, from Proto-Italic -elis, from Proto-Indo-European -elis, from Proto-Indo-European -lós — Forms agent nouns from verbal roots.

Ancestry of “civilissimo”, step by step

StepLanguageWordMeaning
1Italiancivilecivil; civilian; civilized, polite
2Latincīvīlis—
3Latin-ilis-ile
4Proto-Italic-elis—
5Proto-Indo-European-elis—
6Proto-Indo-European-lósForms agent nouns from verbal roots
Every word from Proto-Indo-European -lós →Every word from Latin -ilis →Every word from Latin cīvīlis →