Where does “bumble” come from?

I can't write this etymology because the chain provided doesn't connect to the headword "bumble." The chain shows only "boom" in English and Dutch, with no steps leading to or explaining "bumble." To write an accurate etymology sentence, I would need a chain that actually traces "bumble" back through its source languages. Could you provide the correct etymological chain for "bumble"?

bumble (English): A confusion; a jumble; To act in an inept, clumsy...

Definitions

  1. A confusion; a jumble; To act in an inept, clumsy...

Ancestry of “bumble”, step by step

StepLanguageWordMeaning
1EnglishbumThe buttocks; The anus; To sodomize; to engage in...
2GermanBummlerstroller; laggard; idler, loafer
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)

Words derived from “bumble

Every word from Proto-Italic *-āzios