Where does “armadillo bug” come from?

armadillo bug (English) comes from English armadillo, from Spanish armadillo, from Spanish -illo, from Old Spanish -iello, from Latin -ellus, from Latin -ulus, from Proto-Italic -olos, from Proto-Italic -elos — Forms agent nouns from verbal roots.

armadillo bug (English): A woodlouse, any of various terrestrial isopods of suborder Oniscidea

Definitions

  1. A woodlouse, any of various terrestrial isopods of suborder Oniscidea

Ancestry of “armadillo bug”, step by step

armadillo bug traces back through two separate lines of ancestry.

via English armadillo

StepLanguageWordMeaning
1EnglisharmadilloAny of the burrowing mammals covered with bony,...
2Spanisharmadilloarmadillo
3Spanish-illoAdded to masculine nouns to denote a diminutive...
4Old Spanish-ielloA diminutive suffix
5Latin-ellusAlternative form of -ulus; "forming masculine...
6Latin-ulusUsed to form a diminutive of a noun, indicating...
7Proto-Italic-olos
8Proto-Italic-elosForms desubstantival and deadjectival diminutive nouns
9Proto-Indo-European-e-lós
10Proto-Indo-European-lósForms agent nouns from verbal roots

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-Indo-European -lós