bag på (Danish) comes from Danish bag, from Danish bage, from Old Norse baka, from Proto-Germanic bakaną, from Proto-Indo-European bʰeh₃g- — to bake, to roast, to fry.
bag på (Danish): on the back (of something)
Definitions
on the back (of something)
Ancestry of “bag på”, step by step
bag på traces back through two separate lines of ancestry.