Where does “Mündungsarm” come from?

Mündungsarm (German) comes from German Arm, from German Leuchter, from German -er, from Old High German -āri, from Proto-West Germanic -ārī, from Proto-Germanic -ārijaz, from Latin -ārius, from Proto-Italic *-āzios — Forms relational adjectives to nouns (and rarely numerals).

Mündungsarm (German): estuary arm

Definitions

  1. estuary arm

Ancestry of “Mündungsarm”, step by step

Mündungsarm traces back through two separate lines of ancestry.

via German Arm

StepLanguageWordMeaning
1GermanArman arm; anything that resembles an arm
2GermanLeuchtercandlestick, sconce; candelabra
3German-erForms agent nouns etc. from verbs, suffixed to...
4Old High German-āriused to form agent nouns
5Proto-West Germanic-ārī-er
6Proto-Germanic-ārijaz-er
7Latin-āriuser
8Proto-Italic*-āziosForms relational adjectives to nouns (and rarely numerals)

via German Mündung

StepLanguageWordMeaning
1GermanMündungmouth (of a river)
2Germanmündento flow (into something)
3German-enA suffix of verbs in their infinitive form; A...
4Middle High German-en
5Old High German-īn
6Proto-Germanic-īnaz-en
7Proto-Indo-European-iHnosCreates adjectives of materials
8Proto-Indo-European-no-adjectival suffix
Every word from Proto-Italic *-āziosEvery word from Latin -āriusEvery word from German -er