Where does “focarium” come from?

focarium (Vulgar Latin) comes from Latin focārius, from Latin -ārius, from Proto-Italic *-āzios — Forms relational adjectives to nouns (and rarely numerals).

Ancestry of “focarium”, step by step

focarium traces back through two separate lines of ancestry.

via Latin focārius

StepLanguageWordMeaning
1Latinfocāriusa kitchen-boy
2Latin-āriuser
3Proto-Italic*-āziosForms relational adjectives to nouns (and rarely numerals)

via Late Latin focarius

StepLanguageWordMeaning
1Late Latinfocariusa kitchen-boy; that which concerns the hearth

Words derived from “focarium

Every word from Proto-Italic *-āziosEvery word from Latin -āriusEvery word from Latin focārius