Where does “usser” come from?

usser (Anglo-Norman) comes from Vulgar Latin ustiarius, from Latin ostiārius, from Latin -ārius, from Proto-Italic *-āzios — Forms relational adjectives to nouns (and rarely numerals).

Ancestry of “usser”, step by step

StepLanguageWordMeaning
1Vulgar Latinustiariusdoorkeeper
2Latinostiāriusof or pertaining to a door
3Latin-āriuser
4Proto-Italic*-āziosForms relational adjectives to nouns (and rarely numerals)

Words derived from “usser

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