Where does “backbag” come from?

backbag (English) comes from English bag, from Middle English bagge, from Old Norse baggi, from Proto-Indo-European bʰak-.

Ancestry of “backbag”, step by step

backbag traces back through two separate lines of ancestry.

via English bag

StepLanguageWordMeaning
1EnglishbagA flexible container made of cloth, paper,...
2Middle EnglishbaggeA fabric container; a bag, sack, pouch, purse, or...
3Old Norsebaggibag, pack, satchel, bundle
4Proto-Indo-Europeanbʰak-—

via English back

StepLanguageWordMeaning
1EnglishbackNear the rear; Not current; Far from the main...
2Middle EnglishbakThe back, hind, or rear of a being's body; The...
Every word from Proto-Indo-European bʰak- →Every word from Old Norse baggi →Every word from Middle English bagge →