Where does “-ar” come from?

-ar (Middle English) comes from Old English -ere, from Proto-West Germanic -ārī, from Proto-Germanic -ārijaz, from Latin -ārius, from Proto-Italic *-āzios — Forms relational adjectives to nouns (and rarely numerals).

Ancestry of “-ar”, step by step

StepLanguageWordMeaning
1Old English-eremasculine agent suffix, originally applied only...
2Proto-West Germanic-ārī-er
3Proto-Germanic-ārijaz-er
4Latin-āriuser
5Proto-Italic*-āziosForms relational adjectives to nouns (and rarely numerals)

Words derived from “-ar

Every word from Proto-Italic *-āzios