Where does “tumblebug” come from?

tumblebug (English) comes from English tumble, from Middle English tumblen, from Middle English tumben, from Anglo-Norman toumber, from Old French tumber, from Proto-Germanic tūmōną — to rotate; spin; revolve.

tumblebug (English): A dung beetle

Definitions

  1. A dung beetle

Ancestry of “tumblebug”, step by step

tumblebug traces back through two separate lines of ancestry.

via English tumble

StepLanguageWordMeaning
1EnglishtumbleA fall, especially end over end; A disorderly...
2Middle Englishtumblento fall over and over again, tumble
3Middle Englishtumbento fall, tumble; Alternative form of tomben
4Anglo-Normantoumberto fall
5Old Frenchtumberto fall
6Proto-Germanictūmōnąto rotate; spin; revolve

via English Bug

StepLanguageWordMeaning
1EnglishBugA Volkswagen Beetle car; A Bugatti car
2Englishbuggebeetle
3Middle Englishbuggebogy, hobgoblin, bugbear; scarecrow
4Proto-Germanicbugja-swollen up, thick
5Proto-Indo-Europeanbʰew-to grow, swell; to swell, wax, grow; to blow; to...
Every word from Proto-Germanic tūmōną