Where does “februari” come from?

februari (Middle English) comes from Latin Februarius, from Latin -arius, from Proto-Indo-European -yós — Creates adjectives from noun or verb stems.

Ancestry of “februari”, step by step

StepLanguageWordMeaning
1LatinFebruariusof February; February
2Latin-ariusUsed to form adjectives from nouns or numerals;...
3Proto-Indo-European-yósCreates adjectives from noun or verb stems
Every word from Proto-Indo-European -yósEvery word from Latin -ariusEvery word from Latin Februarius
februari — Etymology, Origin & Word History | Etymology Explorer