Where does “firebug” come from?

firebug (English) comes from English fire, from Middle English fier, from Old English fȳr, from Old English feor, from Proto-Germanic ferrai, from Proto-Indo-European per-nóy, from Proto-Indo-European per-, from Proto-Indo-European pr̥tós — passed , crossed.

firebug (English): Pyrrhocoris apterus, a common red and black...

Definitions

  1. Pyrrhocoris apterus, a common red and black...

Ancestry of “firebug”, step by step

firebug traces back through two separate lines of ancestry.

via English fire

StepLanguageWordMeaning
1EnglishfireA chemical reaction involving the bonding of...
2Middle EnglishfierAlternative form of figer
3Old Englishfȳrfire
4Old EnglishfeorAlternative form of feorr; far
5Proto-Germanicferraifar, distant
6Proto-Indo-Europeanper-nóy
7Proto-Indo-Europeanper-before, in front; first; to go through
8Proto-Indo-Europeanpr̥tóspassed , crossed

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 pr̥tós
firebug — Etymology, Origin & Word History | Etymology Explorer