Where does “-ar” come from?

-ar (Old Portuguese) comes from Latin -are, from Latin -o, from Proto-Italic -ōd, from Proto-Indo-European -éad.

Ancestry of “-ar”, step by step

StepLanguageWordMeaning
1Latin-arepresent active infinitive of -ō; -āre;...
2Latin-oforms masculine agent nouns, positive and...
3Proto-Italic-ōd—
4Proto-Indo-European-éad—

Words derived from “-ar”

Every word from Proto-Indo-European -éad →Every word from Latin -o →Every word from Latin -are →