Where does “onderrichter” come from?

onderrichter (Dutch) comes from Dutch -er, from Old Dutch -āri, from Proto-Germanic -ārijaz, from Latin -ārius, from Proto-Italic *-āzios — Forms relational adjectives to nouns (and rarely numerals).

onderrichter (Dutch): instructor

Definitions

instructor

Ancestry of “onderrichter”, step by step

Step	Language	Word	Meaning
1	Dutch	-er	Forms agent nouns from verbs; Forms nouns for a...
2	Old Dutch	-āri	—
3	Proto-Germanic	-ārijaz	-er
4	Latin	-ārius	er
5	Proto-Italic	*-āzios	Forms relational adjectives to nouns (and rarely numerals)

Every word from Proto-Italic *-āzios →Every word from Latin -ārius →Every word from Dutch -er →