Where does “Bildberichterstatterin” come from?

Bildberichterstatterin (German) comes from German Bildberichterstatter, from German Berichterstatter, 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).

Ancestry of “Bildberichterstatterin”, step by step

StepLanguageWordMeaning
1GermanBildberichterstatterphoto reporter, photo correspondent, photo journalist
2GermanBerichterstatterrapporteur; reporter
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)
Every word from Proto-Italic *-āziosEvery word from Latin -āriusEvery word from German -er