Where does “under-eye bag” come from?

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

Ancestry of “under-eye bag”, step by step

under-eye bag 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 under-eye

StepLanguageWordMeaning
1Englishunder-eye
Every word from Proto-Indo-European bʰak-Every word from Old Norse baggiEvery word from Middle English bagge