Where does “stranissimo” come from?

stranissimo (Italian) comes from Italian strano, from Italian stranio, from Latin extrāneus, from Latin -āneus, from Latin -eus, from Proto-Italic *-eos — Forms adjectives indicating being formed out of a material.

Ancestry of “stranissimo”, step by step

StepLanguageWordMeaning
1Italianstranostrange, odd, dodgy; whimsical
2Italianstraniofirst-person singular present indicative of...
3Latinextrāneusforeign
4Latin-āneusforming adjectives Of or pertaining to; -aneous
5Latin-eusargentum + API → argenteus; ferrum + API →...
6Proto-Italic*-eosForms adjectives indicating being formed out of a material
Every word from Proto-Italic *-eosEvery word from Latin -eusEvery word from Latin -āneus